diff --git a/dlls/msi/action.c b/dlls/msi/action.c
index 44fae9d..749da32 100644
--- a/dlls/msi/action.c
+++ b/dlls/msi/action.c
@@ -33,6 +33,10 @@
 #include "msipriv.h"
 #include "winuser.h"
 #include "shlobj.h"
+#include "objbase.h"
+#include "mscoree.h"
+#include "fusion.h"
+#include "shlwapi.h"
 #include "wine/unicode.h"
 #include "winver.h"
 
@@ -1246,6 +1250,9 @@ static MSIFEATURE *find_feature_by_name( MSIPACKAGE *package, LPCWSTR name )
 {
     MSIFEATURE *feature;
 
+    if ( !name )
+        return NULL;
+
     LIST_FOR_EACH_ENTRY( feature, &package->features, MSIFEATURE, entry )
     {
         if ( !lstrcmpW( feature->Feature, name ) )
@@ -5542,6 +5549,154 @@ static UINT ACTION_MoveFiles( MSIPACKAGE *package )
     return rc;
 }
 
+static HRESULT (WINAPI *pCreateAssemblyCache)(IAssemblyCache **ppAsmCache,
+                                              DWORD dwReserved);
+static HRESULT (WINAPI *pLoadLibraryShim)(LPCWSTR szDllName, LPCWSTR szVersion,
+                                          LPVOID pvReserved, HMODULE *phModDll);
+
+static BOOL init_functionpointers(void)
+{
+    HRESULT hr;
+    HMODULE hfusion;
+    HMODULE hmscoree;
+
+    static const WCHAR szFusion[] = {'f','u','s','i','o','n','.','d','l','l',0};
+
+    hmscoree = LoadLibraryA("mscoree.dll");
+    if (!hmscoree)
+    {
+        WARN("mscoree.dll not available\n");
+        return FALSE;
+    }
+
+    pLoadLibraryShim = (void *)GetProcAddress(hmscoree, "LoadLibraryShim");
+    if (!pLoadLibraryShim)
+    {
+        WARN("LoadLibraryShim not available\n");
+        FreeLibrary(hmscoree);
+        return FALSE;
+    }
+
+    hr = pLoadLibraryShim(szFusion, NULL, NULL, &hfusion);
+    if (FAILED(hr))
+    {
+        WARN("fusion.dll not available\n");
+        FreeLibrary(hmscoree);
+        return FALSE;
+    }
+
+    pCreateAssemblyCache = (void *)GetProcAddress(hfusion, "CreateAssemblyCache");
+
+    FreeLibrary(hmscoree);
+    return TRUE;
+}
+
+static UINT install_assembly(LPWSTR path)
+{
+    IAssemblyCache *cache;
+    HRESULT hr;
+    UINT r = ERROR_FUNCTION_FAILED;
+
+    if (!init_functionpointers() || !pCreateAssemblyCache)
+        return ERROR_FUNCTION_FAILED;
+
+    hr = pCreateAssemblyCache(&cache, 0);
+    if (FAILED(hr))
+        goto done;
+
+    hr = IAssemblyCache_InstallAssembly(cache, 0, path, NULL);
+    if (FAILED(hr))
+        ERR("Failed to install assembly: %s %08x\n", debugstr_w(path), hr);
+
+    r = ERROR_SUCCESS;
+
+done:
+    IAssemblyCache_Release(cache);
+    return r;
+}
+
+static UINT ITERATE_PublishAssembly( MSIRECORD *rec, LPVOID param )
+{
+    MSIPACKAGE *package = param;
+    MSICOMPONENT *comp;
+    MSIFEATURE *feature;
+    MSIFILE *file;
+    WCHAR path[MAX_PATH];
+    LPCWSTR app;
+    DWORD attr;
+    UINT r;
+
+    comp = get_loaded_component(package, MSI_RecordGetString(rec, 1));
+    if (!comp || !comp->Enabled ||
+        !(comp->Action & (INSTALLSTATE_LOCAL | INSTALLSTATE_SOURCE)))
+    {
+        ERR("Component not set for install, not publishing assembly\n");
+        return ERROR_SUCCESS;
+    }
+
+    feature = find_feature_by_name(package, MSI_RecordGetString(rec, 2));
+    if (feature)
+        msi_feature_set_state(feature, INSTALLSTATE_LOCAL);
+
+    if (MSI_RecordGetString(rec, 3))
+        FIXME("Manifest unhandled\n");
+
+    app = MSI_RecordGetString(rec, 4);
+    if (app)
+    {
+        FIXME("Assembly should be privately installed\n");
+        return ERROR_SUCCESS;
+    }
+
+    attr = MSI_RecordGetInteger(rec, 5);
+    if (attr == msidbAssemblyAttributesWin32)
+    {
+        FIXME("Win32 assemblies not handled\n");
+        return ERROR_SUCCESS;
+    }
+
+    /* FIXME: extract all files belonging to this component */
+    file = msi_find_file(package, comp->KeyPath);
+
+    GetTempPathW(MAX_PATH, path);
+    r = msi_extract_file(package, file, path);
+    if (r != ERROR_SUCCESS)
+    {
+        ERR("Failed to extract temporary assembly\n");
+        return r;
+    }
+
+    PathAddBackslashW(path);
+    lstrcatW(path, file->FileName);
+
+    r = install_assembly(path);
+    if (r != ERROR_SUCCESS)
+        ERR("Failed to install assembly\n");
+
+    /* FIXME: write Installer assembly reg values */
+
+    return r;
+}
+
+static UINT ACTION_MsiPublishAssemblies( MSIPACKAGE *package )
+{
+    UINT rc;
+    MSIQUERY *view;
+
+    static const WCHAR ExecSeqQuery[] =
+        {'S','E','L','E','C','T',' ','*',' ','F','R','O','M',' ',
+         '`','M','s','i','A','s','s','e','m','b','l','y','`',0};
+
+    rc = MSI_DatabaseOpenViewW(package->db, ExecSeqQuery, &view);
+    if (rc != ERROR_SUCCESS)
+        return ERROR_SUCCESS;
+
+    rc = MSI_IterateRecords(view, NULL, ITERATE_PublishAssembly, package);
+    msiobj_release(&view->hdr);
+
+    return rc;
+}
+
 static UINT msi_unimplemented_action_stub( MSIPACKAGE *package,
                                            LPCSTR action, LPCWSTR table )
 {
@@ -5630,13 +5785,6 @@ static UINT ACTION_RemoveEnvironmentStrings( MSIPACKAGE *package )
     return msi_unimplemented_action_stub( package, "RemoveEnvironmentStrings", table );
 }
 
-static UINT ACTION_MsiPublishAssemblies( MSIPACKAGE *package )
-{
-    static const WCHAR table[] = {
-        'M','s','i','A','s','s','e','m','b','l','y',0 };
-    return msi_unimplemented_action_stub( package, "MsiPublishAssemblies", table );
-}
-
 static UINT ACTION_MsiUnpublishAssemblies( MSIPACKAGE *package )
 {
     static const WCHAR table[] = {
diff --git a/dlls/msi/files.c b/dlls/msi/files.c
index 1aae66d..d2bef7c 100644
--- a/dlls/msi/files.c
+++ b/dlls/msi/files.c
@@ -57,20 +57,7 @@ extern const WCHAR szRemoveFiles[];
 
 static const WCHAR cszTempFolder[]= {'T','e','m','p','F','o','l','d','e','r',0};
 
-struct media_info {
-    UINT disk_id;
-    UINT type;
-    UINT last_sequence;
-    LPWSTR disk_prompt;
-    LPWSTR cabinet;
-    LPWSTR first_volume;
-    LPWSTR volume_label;
-    BOOL is_continuous;
-    BOOL is_extracted;
-    WCHAR source[MAX_PATH];
-};
-
-static BOOL source_matches_volume(struct media_info *mi, LPWSTR source_root)
+static BOOL source_matches_volume(MSIMEDIAINFO *mi, LPWSTR source_root)
 {
     WCHAR volume_name[MAX_PATH + 1];
 
@@ -84,7 +71,7 @@ static BOOL source_matches_volume(struct media_info *mi, LPWSTR source_root)
     return !lstrcmpW(mi->volume_label, volume_name);
 }
 
-static UINT msi_change_media( MSIPACKAGE *package, struct media_info *mi )
+static UINT msi_change_media( MSIPACKAGE *package, MSIMEDIAINFO *mi )
 {
     LPSTR msg;
     LPWSTR error, error_dialog;
@@ -169,7 +156,7 @@ end:
 typedef struct
 {
     MSIPACKAGE* package;
-    struct media_info *mi;
+    MSIMEDIAINFO *mi;
 } CabData;
 
 static void * cabinet_alloc(ULONG cb)
@@ -265,7 +252,7 @@ static void msi_file_update_ui( MSIPACKAGE *package, MSIFILE *f, const WCHAR *ac
     ui_progress( package, 2, f->FileSize, 0, 0);
 }
 
-static UINT msi_media_get_disk_info( MSIPACKAGE *package, struct media_info *mi )
+static UINT msi_media_get_disk_info( MSIPACKAGE *package, MSIMEDIAINFO *mi )
 {
     MSIRECORD *row;
     LPWSTR ptr;
@@ -311,7 +298,7 @@ static INT_PTR cabinet_notify(FDINOTIFICATIONTYPE fdint, PFDINOTIFICATION pfdin)
     case fdintNEXT_CABINET:
     {
         CabData *data = (CabData *)pfdin->pv;
-        struct media_info *mi = data->mi;
+        MSIMEDIAINFO *mi = data->mi;
         LPWSTR cab = strdupAtoW(pfdin->psz1);
         UINT rc;
 
@@ -423,18 +410,18 @@ static INT_PTR cabinet_notify(FDINOTIFICATIONTYPE fdint, PFDINOTIFICATION pfdin)
 }
 
 /***********************************************************************
- *            extract_cabinet_file
+ *            msi_cabextract
  *
  * Extract files from a cab file.
  */
-static BOOL extract_cabinet_file(MSIPACKAGE* package, struct media_info *mi)
+BOOL msi_cabextract(MSIPACKAGE* package, MSIMEDIAINFO *mi,
+                    PFNFDINOTIFY notify, LPVOID data)
 {
     LPSTR cabinet, cab_path = NULL;
     LPWSTR ptr;
     HFDI hfdi;
     ERF erf;
     BOOL ret = FALSE;
-    CabData data;
 
     TRACE("Extracting %s\n", debugstr_w(mi->source));
 
@@ -457,10 +444,7 @@ static BOOL extract_cabinet_file(MSIPACKAGE* package, struct media_info *mi)
 
     cab_path[ptr - mi->source] = '\0';
 
-    data.package = package;
-    data.mi = mi;
-
-    ret = FDICopy(hfdi, cabinet, cab_path, 0, cabinet_notify, NULL, &data);
+    ret = FDICopy(hfdi, cabinet, cab_path, 0, notify, NULL, data);
     if (!ret)
         ERR("FDICopy failed\n");
 
@@ -495,7 +479,7 @@ static VOID set_file_source(MSIPACKAGE* package, MSIFILE* file, LPCWSTR path)
         file->SourcePath = build_directory_name(2, path, file->File);
 }
 
-static void free_media_info( struct media_info *mi )
+void msi_free_media_info( MSIMEDIAINFO *mi )
 {
     msi_free( mi->disk_prompt );
     msi_free( mi->cabinet );
@@ -504,7 +488,7 @@ static void free_media_info( struct media_info *mi )
     msi_free( mi );
 }
 
-static UINT load_media_info(MSIPACKAGE *package, MSIFILE *file, struct media_info *mi)
+UINT msi_load_media_info(MSIPACKAGE *package, MSIFILE *file, MSIMEDIAINFO *mi)
 {
     MSIRECORD *row;
     LPWSTR source_dir;
@@ -593,7 +577,7 @@ static UINT load_media_info(MSIPACKAGE *package, MSIFILE *file, struct media_inf
 }
 
 /* FIXME: search NETWORK and URL sources as well */
-static UINT find_published_source(MSIPACKAGE *package, struct media_info *mi)
+static UINT find_published_source(MSIPACKAGE *package, MSIMEDIAINFO *mi)
 {
     WCHAR source[MAX_PATH];
     WCHAR volume[MAX_PATH];
@@ -634,7 +618,7 @@ static UINT find_published_source(MSIPACKAGE *package, struct media_info *mi)
     return ERROR_FUNCTION_FAILED;
 }
 
-static UINT ready_media(MSIPACKAGE *package, MSIFILE *file, struct media_info *mi)
+static UINT ready_media(MSIPACKAGE *package, MSIFILE *file, MSIMEDIAINFO *mi)
 {
     UINT rc = ERROR_SUCCESS;
 
@@ -642,7 +626,7 @@ static UINT ready_media(MSIPACKAGE *package, MSIFILE *file, struct media_info *m
     if (mi->is_continuous)
         return ERROR_SUCCESS;
 
-    rc = load_media_info(package, file, mi);
+    rc = msi_load_media_info(package, file, mi);
     if (rc != ERROR_SUCCESS)
     {
         ERR("Unable to load media info\n");
@@ -808,7 +792,7 @@ static BOOL check_dest_hash_matches(MSIFILE *file)
  */
 UINT ACTION_InstallFiles(MSIPACKAGE *package)
 {
-    struct media_info *mi;
+    MSIMEDIAINFO *mi;
     UINT rc = ERROR_SUCCESS;
     MSIFILE *file;
 
@@ -825,7 +809,7 @@ UINT ACTION_InstallFiles(MSIPACKAGE *package)
      */
     msi_create_component_directories( package );
 
-    mi = msi_alloc_zero( sizeof(struct media_info) );
+    mi = msi_alloc_zero( sizeof(MSIMEDIAINFO) );
 
     LIST_FOR_EACH_ENTRY( file, &package->files, MSIFILE, entry )
     {
@@ -841,6 +825,8 @@ UINT ACTION_InstallFiles(MSIPACKAGE *package)
         if (file->Sequence > mi->last_sequence || mi->is_continuous ||
             (file->IsCompressed && !mi->is_extracted))
         {
+            CabData data;
+
             rc = ready_media(package, file, mi);
             if (rc != ERROR_SUCCESS)
             {
@@ -848,7 +834,11 @@ UINT ACTION_InstallFiles(MSIPACKAGE *package)
                 break;
             }
 
-            if (file->IsCompressed && !extract_cabinet_file(package, mi))
+            data.mi = mi;
+            data.package = package;
+
+            if (file->IsCompressed &&
+                !msi_cabextract(package, mi, cabinet_notify, &data))
             {
                 ERR("Failed to extract cabinet: %s\n", debugstr_w(mi->cabinet));
                 rc = ERROR_FUNCTION_FAILED;
@@ -881,7 +871,7 @@ UINT ACTION_InstallFiles(MSIPACKAGE *package)
         }
     }
 
-    free_media_info( mi );
+    msi_free_media_info( mi );
     return rc;
 }
 
diff --git a/dlls/msi/helpers.c b/dlls/msi/helpers.c
index 25c1c71..0dc02b4 100644
--- a/dlls/msi/helpers.c
+++ b/dlls/msi/helpers.c
@@ -31,6 +31,8 @@
 #include "wine/debug.h"
 #include "msipriv.h"
 #include "winuser.h"
+#include "winreg.h"
+#include "shlwapi.h"
 #include "wine/unicode.h"
 #include "msidefs.h"
 
@@ -1054,3 +1056,122 @@ void msi_ui_error( DWORD msg_id, DWORD type )
 
     MessageBoxW( NULL, text, title, type );
 }
+
+typedef struct
+{
+    MSIPACKAGE *package;
+    MSIMEDIAINFO *mi;
+    MSIFILE *file;
+    LPWSTR destination;
+} CabData;
+
+static INT_PTR cabinet_notify(FDINOTIFICATIONTYPE fdint, PFDINOTIFICATION pfdin)
+{
+    TRACE("(%d)\n", fdint);
+
+    switch (fdint)
+    {
+    case fdintNEXT_CABINET:
+    {
+        ERR("continuous cabinets not handled\n");
+        return 0;
+    }
+
+    case fdintCOPY_FILE:
+    {
+        CabData *data = (CabData*) pfdin->pv;
+        LPWSTR file, path;
+        DWORD attrs, size;
+        HANDLE handle;
+        MSIFILE *f;
+
+        file = strdupAtoW(pfdin->psz1);
+        f = get_loaded_file(data->package, file);
+        msi_free(file);
+
+        if (!f)
+        {
+            WARN("unknown file in cabinet (%s)\n",debugstr_a(pfdin->psz1));
+            return 0;
+        }
+
+        if (lstrcmpW(f->File, data->file->File))
+            return 0;
+
+        size = lstrlenW(data->destination) + lstrlenW(file) + 2;
+        path = msi_alloc(size * sizeof(WCHAR));
+        lstrcpyW(path, data->destination);
+        PathAddBackslashW(path);
+        lstrcatW(path, data->file->FileName);
+
+        TRACE("extracting %s\n", debugstr_w(path));
+
+        attrs = f->Attributes & (FILE_ATTRIBUTE_READONLY|FILE_ATTRIBUTE_HIDDEN|FILE_ATTRIBUTE_SYSTEM);
+        if (!attrs) attrs = FILE_ATTRIBUTE_NORMAL;
+
+        handle = CreateFileW(path, GENERIC_READ | GENERIC_WRITE, 0,
+                             NULL, CREATE_ALWAYS, attrs, NULL);
+        if (handle == INVALID_HANDLE_VALUE)
+        {
+            if (GetFileAttributesW(path) == INVALID_FILE_ATTRIBUTES)
+                ERR("failed to create %s (error %d)\n",
+                    debugstr_w(path), GetLastError());
+
+            msi_free(path);
+            return 0;
+        }
+
+        msi_free(path);
+        return (INT_PTR)handle;
+    }
+
+    case fdintCLOSE_FILE_INFO:
+    {
+        FILETIME ft;
+        FILETIME ftLocal;
+        HANDLE handle = (HANDLE)pfdin->hf;
+
+        if (!DosDateTimeToFileTime(pfdin->date, pfdin->time, &ft))
+            return -1;
+        if (!LocalFileTimeToFileTime(&ft, &ftLocal))
+            return -1;
+        if (!SetFileTime(handle, &ftLocal, 0, &ftLocal))
+            return -1;
+        CloseHandle(handle);
+        return 1;
+    }
+
+    default:
+        return 0;
+    }
+}
+
+UINT msi_extract_file(MSIPACKAGE *package, MSIFILE *file, LPWSTR destdir)
+{
+    MSIMEDIAINFO *mi;
+    CabData data;
+    UINT r;
+
+    mi = msi_alloc_zero(sizeof(MSIMEDIAINFO));
+    if (!mi)
+        return ERROR_OUTOFMEMORY;
+
+    r = msi_load_media_info(package, file, mi);
+    if (r != ERROR_SUCCESS)
+        goto done;
+
+    data.package = package;
+    data.mi = mi;
+    data.file = file;
+    data.destination = destdir;
+
+    if (!msi_cabextract(package, mi, cabinet_notify, &data))
+    {
+        ERR("Failed to extract cabinet file\n");
+        r = ERROR_FUNCTION_FAILED;
+    }
+
+done:
+    msi_free_media_info(mi);
+    return r;
+}
diff --git a/dlls/msi/msipriv.h b/dlls/msi/msipriv.h
index 58877ba..90eaa19 100644
--- a/dlls/msi/msipriv.h
+++ b/dlls/msi/msipriv.h
@@ -26,6 +26,7 @@
 
 #include "windef.h"
 #include "winbase.h"
+#include "fdi.h"
 #include "msi.h"
 #include "msiquery.h"
 #include "objbase.h"
@@ -133,6 +134,20 @@ typedef struct tagMSIMEDIADISK
     LPWSTR disk_prompt;
 } MSIMEDIADISK;
 
+typedef struct tagMSIMEDIAINFO
+{
+    UINT disk_id;
+    UINT type;
+    UINT last_sequence;
+    LPWSTR disk_prompt;
+    LPWSTR cabinet;
+    LPWSTR first_volume;
+    LPWSTR volume_label;
+    BOOL is_continuous;
+    BOOL is_extracted;
+    WCHAR source[MAX_PATH];
+} MSIMEDIAINFO;
+
 typedef struct _column_info
 {
     LPCWSTR table;
@@ -889,6 +904,10 @@ extern UINT msi_create_component_directories( MSIPACKAGE *package );
 extern void msi_ui_error( DWORD msg_id, DWORD type );
 extern UINT msi_set_last_used_source(LPCWSTR product, LPCWSTR usersid,
                         MSIINSTALLCONTEXT context, DWORD options, LPCWSTR value);
+extern UINT msi_load_media_info(MSIPACKAGE *package, MSIFILE *file, MSIMEDIAINFO *mi);
+extern void msi_free_media_info(MSIMEDIAINFO *mi);
+extern BOOL msi_cabextract(MSIPACKAGE* package, MSIMEDIAINFO *mi, PFNFDINOTIFY notify, LPVOID data);
+extern UINT msi_extract_file(MSIPACKAGE *package, MSIFILE *file, LPWSTR destdir);
 
 /* control event stuff */
 extern VOID ControlEvent_FireSubscribedEvent(MSIPACKAGE *package, LPCWSTR event,
diff --git a/include/msidefs.h b/include/msidefs.h
index 379a22e..12b607d 100644
--- a/include/msidefs.h
+++ b/include/msidefs.h
@@ -201,6 +201,12 @@ enum msidbMoveFileOptions
     msidbMoveFileOptionsMove = 0x00000001,
 };
 
+enum msidbAssemblyAttributes
+{
+    msidbAssemblyAttributesURT = 0x00000000,
+    msidbAssemblyAttributesWin32 = 0x00000001,
+};
+
 /*
  * Windows SDK braindamage alert
  *
-- 
1.5.4.3