you can try what i did.
One time i decided to plug in a USB keyboard (while the PS2 keyboard was already pluged-in) and i could use both keyboards at the same time so try it.
Use a USB keyboard, the only i guess you my present is that if you on safe mode(using windows) it might not work. But i guess that depends if you have XP. I don't remember much of that.
Good luck with the keyboard.