Originally posted by another user
1. Go to This xbox Live Profile iTz x Skelly.
2. Download the only File in there Thats a Custom Game Type.
3. Load up the File.
4. It will take you to Private Match.
5. Now go to Your File Share,Delete the File,Then go to Edit Games Setting,And Press X to Save it again.
6. Now go to combat Training,
7. Now go to Switch Lobbies and Hover over Private Match.
8. Click B,Go to your File Share,And load the Gametype by Continually Pressing A until your in a Combat Training Lobby.
9. Check and if there is no Time Limit you have done it right.