[Wine] Dosbox integration problem

[digikata]

I'm having problems running a batch script that executes a combination of 32 and 16 bit exe's.  The 32 bit programs run fine. When the 16-bit exe executes, wine finds dosbox and dosbox executes the program fine. However that 16 bit program creates a file which then needs to be used in the following part of the script. There's no sign of that file after dosbox exits and wine continues to run the rest of the script with errors for the missing file.

If I startup dosbox separately, mount the location and run that fragment of the script, the file is created and exists after the execution completes and dosbox shuts down.

In the dosbox integration code for winedvm, I see "mount -z ..." dosbox commands but can't find docs describing what the -z flag does.  The wine integration code builds up a dosbox config file executes dosbox then wipes out the file. Is there a workaround, or does anyone have any insight into what's might need to be changed?  Otherwise, I think I'll see if I can capture the "as built" config file before it's erased and see if I can reenact  the disappearing file behavior using that config on dosbox standalone.

This is on wine-1.5.2 and Dosbox 0.74 on OS X Snow Leopard.