In your BIOS you should have an option to enable USB legacy support.
This allowed my USB mouse to work in Win98 install and in Linux, but for some reason not in Linux install. Hrmm...
Of course then your mouse works on the USB IRQ and there is also an HID virtual mouse running on the PS/2 IRQ so you don't get the IRQ back if you do that.
xtreme2k: I must say that I agree with you on everything but the CPU usage, yes USB stuff uses CPU time, but seriously...it's a mouse...how much can it use? Other than that I agree...but the problem is PS/2 is ISA based..so when ISA goes so does PS/2. we'll have to get USB keyboards eventually. I'm personally in no big rush to move my KB and Mouse to USB, but it will happen eventually.
I'm quite happy with a 100hz refresh on PS/2 though, and then it works in Win98SE,2k and Linux and in all the installers. *shrugs* to each their own, some like USB mice, some don't.