I have 3 Panasonic Plasma tv's and 3 directtv boxes. I have a IR repeater system set up in my basement that is linked to my equip. room. Is there a way to assign 1 box per tv so that when I change the channel on my 50" plasma it does not change the channel on my other 32" plasmas that are right beside the 50". I wan to dedicate 1 box to each tv. Is this possible? I am using an Universal R50 remote.