very cool project man. mind giving a layout on how you wired the guns to the I-Pac? Could you just wire them to any key? btw, more pictures! :) and maybe some terminator running.Actually, it's an A-PAC (http://www.ultimarc.com/a-pac.html) rather than an I-PAC. The A-PAC is Ultimarc's analog encoder board for use with analog devices like 270-degree steering wheels, analog joysticks, etc. It works great with the guns.
The only parts of the guns that don't work are the force feedback motors, so the guns don't vibrate when you fire them.
I saw that hack, but there's a few problems with it. It only works for Terminator 2 and it requires building a custom circuit. Also, the motors in these guns appear to be dead...The only parts of the guns that don't work are the force feedback motors, so the guns don't vibrate when you fire them.
There's a hack (http://1uparcade.robandmitsue.com/arcade-downloads.html) to make the force feedback on the guns work on 1Up's site.