I know this is an old subject, but I did several searches and couldn't find it. Does changing the Remote Address for the Satellite Receiver change just the IR, just the UHF, or Both?? I now have a 721 and a 6000 (both UHF) sitting next to each other and I am trying to get them to behave by trying combinations of removing UHF antenna/antennas, taping over IR port/Ports, changing addresses, etc. So far I have failed. Either remote control both receivers, no matter what I try. I Want to use both remotes (that way my wife only has to worry about the Silver 721 remote). I will use the black 6000 remote when I want to watch HDTV. She has sworn off HDTV because "it doesn't look any better and it's too complicated". Please help with any info you have. I know Scott probably has a dozen receivers he is testing and probably knows all the tricks.