Can someone help me out with what is needed and about what it is going to cost before I spend time on the phone with Directv? I have been a subscriber for just over a year. Currently I have 1 HD-DVR, 1 HD receiver and 2 SD receivers. The HD-DVR is connected to my home network with an ethernet cable but none of the other receivers are connected. I would like to replace one of the SD receivers with an HD-DVR and have be able to watch recorded shows from any of the HD capable receivers. What is it that I need and what is it going to cost me both for installation and for additional monthly fees? Thanks for you help!