Hello! I want to add three more TVs in my family room and have a total of 4 DirecTV receivers. I only have one coax wire coming from the main distribution point of my house. I know that DirecTV cannot be split like cable, but with DirecTV's SWM technology, can this be done? I will have a DVR and three HD receivers. It is not possible to run additional cables from the satellite dish to the room. Please advise! Thanks!