- last post: 01.01.0001 12:00 AM PDT
You have to link your Gamertag to your Windows Live ID. Go to this page, and make sure that you're signed into the same Windows Live ID Account. There will be instructions that you'll have to follow, but you'll need the following:
1. Name of Live account credit card holder
2. Last four digits of the credit card number
3. The phone number
4. The postal code
You can get all of this information from the Xbox Dashboard. Once you're finished with that part, go into your Profile and enable "Show Gamertag", and there should also be an option in your profile's Live settings about applying a Bungie.net background-image to your gamertag.
Cheers,
Seldon