the cable from your comp that looks like a PS2 connector is an S-video cable. You'll need an adapter, from radio shack or somthing. Also in the driver there is a place to specify TV out settings, you'll want to set that to composite instead of S-Video if you use an adapter, because its a different signal. But you still will need that rf adapter rbV5 mentioned to convert from composite to coaxial.
yeah, a its a lot of trouble, good luck!