Hello everyone! Love this site. Anyway, I have a question and forgive me for the ignornace as I am new to this. I presently have a whole home connected setup with two HR-24 and one HR-21 (i think that is right). I was thinking of getting a genie from some place like solid signal or ebay and replace the HR-21 with it. Is this something I can do or do I still have to have Directv install it? Thanks in advance for any help.