Ok right now I have a 721 and 501 hooked up to a Dish 1000. The Dish 1000 has two outputs one goes to the 501 and one to a seperator which goes out to the two inputs of the 721. If I want to add another reciever how do I do that? Can I get another seperator and hook it up to the line that goes to the 501 and hook one into the other reciever and one into the 501? I'd like to hook up a 211 also and to my understanding there isn't a quad lnb for these things. How would I go about doing this?