I currently have a regular small dish with a single, dual-output LNB. The two lines are connected to a 2 x 4 multiswitch in the house which in turn feed two dual-tuner DirecTV receivers with TiVo. I'd like to upgrade the dish and buy an additional receiver to take advantage of the High Def feeds on DirecTV. If the new dish is installed, are the two cables that presently run into the house enough, or are additional cable runs necessary? I know there is some sort of multiswitch configuration on the dish itself, but I have not been able to locate specific info. Thanks very much for your assistance!