HOW TO GET THE DOWNLOAD ON AN USB TO YOUR XBOX 360:
1. Download the world from either of the two links above.
2. Plug your USB into your xbox.
3. Move your Xbox live profile from your xbox Harddrive to your USB.
4. Plug your USB into your computer.
5. Download Horizon [ Register or Signin to view external links. ]
6. Load up your profile
7. Inject the world download file into your profile.
8. Rehash & resign.
9. Plug your USB back into your xbox.
10. Move your Xbox live profile from your USB back to your xbox Harddrive.