Wayne,
You should be working as a tech for some of these computer companies. Your satellite dish is ok but you will have to upgrade the receiver to a Hi Def one. On the antenna I can't remember for sure but I think my receiver has a place on the back to hook the coax from the little splitter thingy as you called it but since I get my local channels on the satellite too, I don't have any antenna. Can you get your satellite channels on all of your TVs or just the ones from the antenna? My receiver will only feed two TVs.
Ron