In MAME32 (maybe in others too) you need to go to the MAME folder
go to the ctrlr folder
make a folder called MAMErGAMEr or something like that
then copy your std.ini from mame\ctrlr\ to the MAMErGAMEr folder
download the file I called mspacman.txt above and rename it mspacman.ini
copy that file to your mame\ctrlr\MAMErGAMEr directory
Go into MAME32
Go to Options/Default Game Options
Click on the controllers tab
at the bottom of the window there will be a drop down menu that will now contain an option for your Default Input Layout called "MAMErGAMEr"
Okay, SP, I really don't want to be a pain in the butt here, but the last thing I can think of, is...
MAME32 has options to flip the screen different directions...
is there a way to set the ROM to cocktail (flipping) but have MAME NOT flip the image?
Then the ROM would use player 1 and 2 controllers (in theory) and the screen wouldn't flip..giving the desired effect, while leaving the original roms....original.

Thanks agian
Matt