Yeah, i've researched this issue as much as I knew how to. I have several posts on the insanelymac forums, and directly contacted other people with this same issue and no one has an answer. I seriously think the root issue has to do with my motherboards I/O ID's.

When I boot the leopard install disk(generally with -v, but have used -v -x -s -f in many different combinations), the boot information looks healthy, it probes the USB devices and finds them, but about a second later it calls for a I/O reset, and that seems to turn off my USB devices(I've used PS/2 devices, and the same thing happens). I've tried a million different things, and especially the obvious things. I really don't think there's anyway to get around this issue without compiling a new USBIOFamily.kext that matches this motherboards I/O ID's.