hey JD if you want to use the usb pen drive on your xbox 360 you have to update the dash board of the xbox
to update the xbox 360 you have to download this file:
http://www.megaupload.com/?d=OQGR3MEG
after you download it you have to extract the file and open the folder you will see a file,with the file you have copy and paste it in your pen drive,then put your pen drive on your xbox turned off then turn it on and when the xbox will start it say to you if you want to update your dashboard choose yes and automatecly the xbox will start the update after that you now able to use usb device
hey JD please post your roster