Caution: The Competition Pro USB has lag! Useless for accurate gaming, at least to me.
If you don't mind a bit of fiddling with self-made cables and have a parallel port, PPJOY drivers and an Amiga 4 Player adapter cable is what you need:
http://www.geocities.com/deonvdw/Doc...w/Docs/FAQ.htm
PPJOY is a driver that supports two 9 Pin Amiga Joysticks connected to your PC parallel Port using Amiga 4Player adapter cable (easily self-made, no resistors or circuit boards or soldering required to make such a cable).