I need to install my D* tivo box in an upstairs room. It would be a huge undertaking to run two new lines to the room. There is already one line run, so is there anyway to use diplexers or something to deliver two leads to the room from a phase 3 dish without stringing more cable? If I need to use a switch for this, is there one that will work outdoors? I'm trying to do this the easiest way possible. Thanks.