I just called DirecTV to have MRV activated/installed. The rep was very friendly and helpful, but I'm not sure I'm getting what I need. My HR21-700 currently has 2 coax lines directly from the dish and is network to my router. I have On Demand available on this DVR. My HR20-700 has 1 coax line directly from the dish and is not networked and cannot easily be networked. I have no SWM. She said that since I already have 2 compatible DVRs and "seem to know what's going on" she is going to send me a DECA for the HR20 at no charge so I can install it myself. According to her, once the DECA is installed on the HR20 and MRV is activated, the 2 DVRs will be able to see each other. From what I've seen here on the forum, I don't think it's that simple. Any comments?