I got a pinnacle studio capture device that connects from the PC to the 360
It has a USB that plugs into the PC, you take the red, yellow and white plugs out of the TV that are from the 360 and put them into the capture device, and put the switch on the gray plug in the 360 to TV if set to HDTV, but it didn't work for me, i used a program called BroadCam i think it is, and it ain't picking up the device's signal, but it knows it's plugged in, maybe it can only use it's own software, on the Vista PC, there's a program, i forget the name, but it has to do with capture devices, i ain't sure how my brother found that, but i wonder if that'll work on the XP PC