I don't think the roms for Platoon even exist. I had a copy of the laserdisc and the video was fun to watch, but unplayable.
I am doing the ALG multi-rom thing too, it's pretty neat. I have Mad Dog 1&2 and Drug Wars 1&2, but I have never been able to find Gallagher, Space Pirates or Who Shot Johnny Rock.
Weird, I have never seen that before. Looks like that big control panel bolts on to the cabinet where the guns go in the front. After checking, it looks like there was just a big bunch of discs on eBay that have all ended, but if anyone wants to come close to what Todd got for his Crime Patrol, I will sell them mine...