How do I change my display picture on my XBOX LIVE gamer card?

I want to change my display pic to one that is not one of the preset ones (for example i want a picture off the internet) ThanksHow do I change my display picture on my XBOX LIVE gamer card?you cant do that you can download the mfrom marketplaceHow do I change my display picture on my XBOX LIVE gamer card?its in the xbox dashboard options. Hit the center "X" button, wait for the dashboard to pop up and i believe its under user settings or something like that.How do I change my display picture on my XBOX LIVE gamer card?hit the xbox guide button go to edit profile and select change gamer pic