I currently have a Philips Tivo with a non-HDTV tv and will be soon upgrading to HD. Obviously, I will be getting an HD receiver. Using Directv, is there any way that I can hook up the old Tivo and the new HD box and get picture in picture? I figured since I have to buy a new receiver and I still want to use Tivo, I would give it a shot. I assume I can still use my Tivo box (to pause, fast forward, etc.) and the HD box on with the one TV? Any suggestions would be great. Thanx.