I have a question and I think I would get a better answer here than I would calling a CSR. I got a new HD TV a few months ago for the first time (replacing one of those old brick TV sets) and was thinking about upgrading from SD to HD. I had DTV installed back in 1996 (with a minor change to the actual dish in 2010 when the signal stopped working). If I do upgrade from SD to HD, do I have to have the actual dish replaced, too, since the dish has been up since 1996 (before HD)? or can I just order a new receiver and just hook it up?