check this mod
BEST USB mod!
http://www.youtube.com/watch?v=-tQzE35TVP4All you need is a USB 2GB+
here is how to do it
Step 1 - Configure your Xbox 360 USB Flash Drive:
1. Plug the USB flash drive to the Xbox 360 console.
2. On your console, go to My Xbox, and then select System Settings.
3. Select Memory.
4. On the Storage Devices screen, select USB Storage Device.
Step 2 - Download the game save and Modio:
1.Download the modded game save here:
http://www15.zippyshare.com/v/67895365/file.html2.Download and install Modio here:
http://www.game-tuts.com/community/modio.phpStep 3 - Move the game save to your profile.
1.Connect your USB
2.Open Modio and click explore a device.
2.Move the downloaded game save to your USB.
4.Connect the USB to your Xbox 360 and move the game save to your profile.