My time

Recently I've been busy setting the MediaCenter on my PC to record all the shows I enjoy to watch and trying to keep up with what has been recorded so that I would not take up all the space. Even though I don't have to watch the shows when they come on and can stop or start whenever, I feel like I don't have enough time to catch up with it. I wonder if Tivo takes as much space recording shows as this MediaCenter does. I've heard before that people can alter their Tivo's to do certian things...makes me hope for the abilitiy to do that w/ the almost unconfigurable MC.