I have a bunch of xvid incoded .avi files (podcasts, not what u think) and I want to burn to disc. I have about 21 of them. I notice when you buy Seasons of shows you get like 2 discs at the most. How do they put 15 to 25 episodes onto 1 or 2 discs? I don't understand. I can fit, using DVDFlick 4 episodes on 1 disc. Explain please.