hey, i was wondering about how to go abou using multiswitches. i have a dual LNB dish netowrk system. i have had the system for a year or so and now i want to add 2 more recievers with the multiswitch. i have a used reciever from a friend, so will i need to get the card programed to work with my system? Or could i go to a dealer and buy a new one?