It's been years since I participated in this forum which, I suppose, speaks to the reliability of my 722K setup at my house:-). My question is this. I'd like to have my 21.0 UHF remotes be able to control the TV1 channels (thinking I'd like to program the AUX mode to control the TV1 part) so that when I'm in the other rooms I can change the channel rather than just tune to it at watch it. I get that it's likely only IR so I'll need to do the IR extender thing which I'm fine with. I'm wondering what code I can use to tell the remote to control this. Looking around here and on the web in general I see some mention of doing this but I haven't yet found any codes that I should be using. Anyone have any tips? The few manuals that I've found for this remote (I actually have two 21.0's and one 21.1) don't mention this.