Well, you've got it pretty easy. Hook the DVD and Cable box into the reciever using S-vid and optical. Hook the TV to the reciever using S-video. The big question comes with the TV audio in. The way that I've done this is to run the TV audio off of the tape out. Others may have a more elegant way to do it. The downside to this is that the receiver will have to be on any time you want to watch TV. If your TV has S-video switching, then you may be able to do something else, but mine doesn't, so that's the experience I'm working off of.
