So, I just installed the Prosystem emulator for the 7800, and have it working well, but apparently you can't use the triggers on an Xbox 360 controller with it? I looked online and they said something about a Z axis, but I don't see that listed as an option in the controller setup. I am using the A button currently, but would much prefer the trigger to shoot especially in a game like Centipede where that's all you do it shoot the whole time.