I am about ready to purchase a HR10-250 HD Tivo and a SD Direct-TV Tivo. I want to install them in the equipment rack in my theater where they can feed the theater and the RF distribution network to the rest of the house. Will one remote control both Tivos, or can they be uniquely programmed to control just one unit? The desire is to have a unique remote just control just one tivo, without messing up the second unit.