Yeah I figured it might not be a big help, but thought I would report my findings anyway.
Like the others said though, if you gave us more info we might be able to suggest something that would work.
For example if it's just a room that doesn't have coax run to it, but it does have ethernet you might be able to do something like this. Buy a long run of coax and run it down the hallway from a room that does have a coax connection. Hook it and the ethernet up to the reciever and then plug the receiver in and let it boot up, get the guide data, get MRV working. Once all of that is working you could disconnect the coax, roll it up, and store it in the garage. The receiver would continue to work with MRV for a while, but when it loses authorization you could just run the temporary coax again, hook it up and let it get reauthorized, disconnect again, etc.
You would probably have to do this every week or two, which seems like a bit of a pain, but it should work.
If that's not the exact situation we may be able to figure something else out. HDMI over Cat 5/6, wireless HDMI, seperate dish, etc. The guys here are pretty resourceful and chances are somebody has already thought of/tried whatever you are wanting to try.