amargiot: just to confirm: you opened the keyboard and sniped red and gray, right? The ones towards the edge of the chassis?
I want to use this keyboard too since my I-O is for playing MP3s and sits next to the stereo. I don't want a huge honking keyboard sitting around, especially if all you need to use to run it is the mouse.
Also, once you snipped, I presume you plugged it into the "mouse" half of the splitter, right?