I have an HDTV in one room and a smaller regular TV in another room. Both rooms have two lines each, coming from my satellite dish. I believe it is a quad LNB. I have two receivers in each room. In the room with the HDTV I have an 811. I also want to connect my new 721 up to the HDTV. What I was planning to do since I do not have two dedicated lines for the 721, is to hook one dedicated line directly to input 1 of the 721. Then I would like to use a splitter on the other line in that room. From the splitter I would run to the 811 input and also to input 2 of the 721. I realize that both lines from the splitter must see the same channel, but that does not bother me. I hope that using the 721 I can record two stations and also play back a prerecorded program. Would the 811 have to be turned off to do this? Or can I have the 811 set to the same channel as input 2 of the 721? My dealer of record does not do the 721 promotion and install so I have purchased the receiver from another dealer, but do not get installation. That is why I need to get by with the existing four lines. Are there problems with this setup? If I am willing to have the installation modified, what do I need to add and how must it be connected to have both the 721 and 811 independent? Thanks for any help.