forget the 'not a valid Win32 application' thing, that was my mistake and its fixed now
the file is called MafiaSetup.exe
im using Hex Workshop 4.2, there is no separate entries for the three disks, just one entry that says 'MAFIA_CD_%i' so i guess the %i stands for whichever number of the disk that is being asked for at the time.
i changed this to MAFIA, replacing the last 6 characters (_CD_%i) with spaces.
but now the file does nothing at all when it is run
if you have any advice, post it here, as this is a Doom 3 thread and we might upset someone
http://www.fileforums.com/showthread.php?t=63303