I recently had MRV installed by Directv. The install went great and it works well. I have a Humax tv with a built in Directv SD receiver which I think is a D11 receiver. The installer said he had to add something to the install that would keep this receiver working because it is SD and will not work for MRV. I have 2 DVR's and a Hd receiver on other tv's and I would like to replace the Humax with a high def tv and H24 receiver so MRV will work on this tv also. My questions is what do I need to do to hook this up myself? Is there something the installer used that I must now remove? Thanks to anyone that may be able to help.