Thanks, Stanley. Yes, new technology is always better than old technology. In my case, though, this H20 and the TIVO are byproducts from having been replaced by an HR20. They are free. I already own them. Both work fine. Great for a guest bedroom and an older CRT HDTV. I've got two HR20s, in the main rooms I watch TV in.
The room this TIVO and H20 are in is a basement room with no easy way to run new cables to. The single existing cable is RG59. HR20s do better wth two sat feeds, and prefer RG6. It was easy to run new cables to them. It is not easy (may even be impossible) to run new cables to the H20/TIVO location.
This thread is all about the potential. The TIVO got demoted from the master bedroom because it's IR control of the H20 was not reliable. My wife would get very irritated when the TIVO would record the wrong channel or an hour of black because it had failed to change the H20's channel correctly.
I've got the summer off (as a college professor) and a desire to make the TIVO work better with an H20. The TIVO has great features that the HR20s don't have. It will be very satisfying to get it working, and I suspect many others will benefit from the information.