1. Create your modded Gamer-Tag.

2. Then go to the Xbox Dashboard, and sign out of all accounts.

3. Then you load up "Call of Duty - Black Ops'

4. Press start, go to multilayer and click "Xbox Live"

5. It will ask you to sign in, try to sign in with your modded account.

6. It will prompt an avatar selection, and just click any avatar. You will get another error.

7. After click ok, grab your second controller and click "A". It will load a Sign-In screen.

8. Then with your first controller, select your real Xbox Live account then you in thank topic:) I Know this has been post but i felt like it would be a little helpful no flame!!