New poster, upgrading to HD, Bought new dish off ebay .Have new hd20 recieverfrom direct tv.plan on running 2 recievers, new hd and old non hd. do i need 2 home runs and where do i connect at SL3 K4Nro-o2 lnb.I have installed old dishes this is my first install of hd Can someone hook a brother up?