i have a 722k hooked up to 3 tvs. i would like to watch dvr programs on the 3rd tv which is the same as tv1. now on the 3rd tv i also have a 222k hooked up. is there a way i can use either a 21.0 or 6.3 remote to control the 222k on ir and the 722k on uhf by either flipping a swicth or key . or is it best to use 2 different remotes.