I just got a Replaytv 5040 and I love it - EXCEPT for one thing. Why can't I get access to my Comcast Cable's "On Demand" listings? I can't find any way to call up the "On Demand" program guide now that all my menus have been replaced with Replaytv's channel guide. Can anybody help! Is "On Demand" not supported if I use Replaytv? That would be a major drawback.