To expand on Wareagles reply: If you set up favorties w/ all the channels you watch or get, you hit guide then fav's till it selects list number at top of screen then browse channels from list you created.
I used my dvr that way all the time, I had a fave watch list and an all my channels list. Its worked great except that if you choose something to look at you have to repeat guide and favs select before continuing the search as a fav.
This is the most annoying lack of setup options. It is pretty ridiculus to automatically have to scroll through hundreds of channels that I am not subscribed to. This is an obvious feature that their competitors have had for years.