What you will need:
Haddz gt editor

1)Go onto your xbox, system settings, memory and move your profile to your memory unit.

2)On your computer Open up hadzz gt editor and press open from usb.

3) you will see e00000000...... click it then you will see ffeod1 click that and carry on clicking until you get e00000 again, then click open.

4)From here you will see your gamertag in a white box, delete that and insert what ever you want.

5) when done press save to usb, modded profile.

6) it will then say some error, take out your usb and put it straight back in.

7) it will then give you an error about account already existing press okay and then it will say modded profile saved or something.

8) Then put your usb in your xbox and you will now have 2 profiles.

9) move the modded profile first and then your original account.
10) if you want to sign into it on Mw2 or waw or Mw sign into your modded account then go onto the game.

11)when you click xbox live it will say not aloud on xbox or something, click okay and then sign into your original account and you will have your modded name online!!!!