How do you interface the p99g2 to a PC?  It's the PS2 version right?  I've had a hunch that they might just work plugged straight into the USB since the PS2 uses standard USB drivers.  Does the PC detect it as a light pen as I"ve suspected?  Or do you need some sort of interface/driver for it?
  Please excuse all the questions.  I've suspected that these guns would work with my PC for a while now and haven't been able to find anyone who has tried it.  Everytime, I've asked I've just been told to go buy and ActLabs gun.  So, I'm a bit excited to see that someone else has apparently had success with a PS2 gun!