My parents had dish network installed in the late 90's in a newly constructed home utilizing a 301 in the family room and a 301 in the bedroom and a dish that pointed at 110 and 119. Nothing has been upgraded since that time. I have "finally" convinced them that they need to get new hi-def tv's and new receivers. I assume that the dish itself will need to be replaced in order to get signals from 3 satellites. Dad really wants dual tuners for PIP, but the house was built with only a single coax run to each tv, and mom is afraid someone will damage her walls during installation if additional wiring is required. The question I have is can they upgrade to dual-tuners without having to run additional coax through the walls? Thanks in advance for any advice.