A co-worker has Dish Network and just added two more HDTV's for a total of four in his house. He was told by Dish that he cannot have more than three of the four HDTV's hooked up to an HD receiver. I went to their website and did the builder - and sure enough it only allows three HDTV's per household. Are there any work-arounds so he can have all four hooked up to HD receivers?