SirPoonga & uRebel,
I'd be willing to assist in any way with testing multiple mice code on WinXP. I might could look at writing some routines as well, however I'm rusty at Windows code, as I've been in the Web/Java world for 7+ years now. I'd probably need to be pointed to some sample code to start.
I have two machines at home with XP on them (one in my cabinet), and my cabinet has a trackball, spinner, and standard mouse attached to it. So even without two lightguns, I could still test some multiple mice code on XP.