So I got my son an xbox for Christmas. With a 320hdd with a free Lego Star Wars III download. Started the download and it took over an hour to reach 50% complete. I didn't have time to stick around so I left it downloading. Came back later and the xbox is off. I remember something about the power saver shutting off after 1hr. of inactivity. So how do you download large games without staying with the xbox to maintain activity?