A day, I noticed for some years ago, some WHDLOAD games might require to been installed on a real Amiga harddrive (ETC on a harddrive file, formatted by the UAE Emulator, before they might work, and not directly on a PC drive. The batman game need to copy to a emulated hardrive file, before it work correctly on a emulator.... I do guess this bug have been fixed since than.
I have to ask, what does the quicktimes dlls do in your package?
For easier emulation for both arcade and nonarcaed, it would been neat iif each game was a bootable "HD0" file in a contained size, required by the game (so it would work like a emulated harddrive), but this would break the combatible with real Amigas.... But a utility to convert them would been very good.