Can't get 20PacGal.zip working on any emulator.

I'm running an xbox with XBMC and I've installed MameOX, XRaine and CoinOps but not one of them will even recognize or pick up 20pacgal.zip (which is the Ms. PacMan & Galaga dual arcade games you still see from time to time). I've tried several different versions of the 20pacgal.zip file, I've downloaded Namco bios's and placed them into the roms folder and bios folder with no luck.

When I place the rom into the folder and scan for game, it never appears. I can't even select it to run the game. I've even removed all of my roms and placed just this one into the rom folder and still it doesn't show up at all.

Any help or suggestions would be greatly appreciated.

Thanks,