depends on what dx it uses..
also depends on the exe and if it can go both ways
also depends on drivers
also depends on the OS
so win 7 64 bit has an XP mode, if you know how to use it.. kinda like a built in VM box,
and there is always that option to vm it.
gothic 2 has all the installers that work just fine or it couldnt be sold on gog or steam.
etc
fixed exes.. i hope you dont mean cracks.. thats another thing but those might work, just meh
compat modes arent what you are after..
since 32 bit isnt that mode.
and the installer has no clue how to read modern dx files.
note only win 7 (non home has the feature im talking about )
might want to check the exe files you are replacing,
and here is some stuff from a site on vmin it.. though it does work on 64 bit os's
just the installers need changed to look for nothing, and all digi (no discs) means copying all files to hd.. etc
Some times a virtual solution may be the answer.
Windows Virtual PC
Download Windows XP Mode
http://www.microsoft.com/windows/virtual-pc/download.aspx Windows XP Mode (Windows 7 only, but not any of the Home versions) "You are not eligible to download Windows XP Mode. You must have Windows 7 Professional, Enterprise, or Ultimate to run Windows XP Mode".
Virtual PC 2007
http://www.microsoft.com/downloads/details.aspx?familyid=04d26402-3199-48a3-afa2-2dc0b40a73b6&displaylang=en&tmRunning Virtual PC 2007 on Windows 7
http://blogs.msdn.com/virtual_pc_guy/archive/2009/08/19/running-virtual-pc-2007-on-windows-7.aspx