If you have the DVD donlge w/remote you can play your DVD Backups and VCDs (although I haven't tried VCDs yet, but it should work). If you don't have one then you do as xoltana has stated. An excellent Xbox program is Xbox Media Player 2.01. Your'e able to pay VOB, MP3, Dvix, Mpeg and Avi's. A modchip is required to do any of these things.