[Wine] How to edit/modify system32 exe files?

[argolance]

Hello,
I would like to try to edit/modify default values of winebrowser.exe (for example with Reshacker) for it to open url and email addresses with Seamonkey... (Trying to solve this problem => See my post) (http://forum.winehq.org/viewtopic.php?t=9915)
> +-WineBrowser
> | |
> | +->Browsers
> | | [List of browsers that Wine will attempt to launch when running winebrowser
> | | command or clicking on a link in a Windows application. Default value is
> | | xdg-open,firefox,konqueror,mozilla,netscape,galeon,opera,dillo]
> | |
> | +->Mailers
> | [List of mail clients that Wine will attempt to launch when running winebrowser
> | Default value is xdg-email,mozilla-thunderbird,thunderbird,evolution]
Is it a wrong idea?

Regards!