A) If they are wireless then they should have a shared receiver that will have a usb connector and a PS/2 connector. If that is the case, connect only the usb connector and both should work. I have a Logitech wireless combo that works only with USB even though they have a PS/2 connector....
The PS/2 connector is only for people who dont have a free usb port. In that case you need both the PS/2 end connected AND the USB end connected through a PS/2 adapter (usually provided)....
B) Let me get this straight. If you push and hold A, then push and hold B, then release B, your A doesn't auto repeat??? Cuz thats what always happens anyway...
like aaaaaaaaaaaaaaaaaaaaaaaabbbbbbbbbbbbbbb bbbbbbbbbbbbbbbb (now I depressed B, but A doesnt continue autorepeat....)
This is common in word processos, but shouldn't be in games. Try the config above, see if it helps. If not, maybe you need MS's drivers??? If not, try another game!!
Hope this helps!
Cheers