We want to install an already purchased 2nd vip622 HD receiver in order to have HD on two TV's. Does this require a second cable to be run from the antenna to a second splitter? Or can the current single cable from the antenna be plugged into a splitter device that will allow cable to be run to the two TV1's and also the two TV2's? If so, is there a specific (Dish Pro compatible) splitter that needs to be purchased? Just what are the connections for adding a second HD receiver?