Just a heads up, you can now select a theme for your profile by customizing it. (I am in...

i think there should be some kind of theme walkthrough on youtube for whatever theme you are looking to buy, just a little heads up if you are looking to buy another theme. they should definitely have at least screenshots of the the theme on the page next
to purchase, but for now, just look up "mass effect xbox 360 theme" or whatever on youtube.

This might help you. Personalize your Xbox 360 console

Change your theme

On your console, sign in using your profile.

Go to Social, and then select your avatar.

Select Change Theme.

Select a theme.

Note You can also purchase additional themes from Xbox Live. On your console, go to Games, select Browse Games, select Extras, then select Themes.

When i select the option to customize the avatar nothing happens, and the only theme i can select is the standard 360 theme

To change theme

On your console, sign in using your profile.

Go to Social, and then select your avatar.

Select Change Theme.

Select a theme.

If you select picture viewer, you can't see images on your hard drive.

try heading to settings (in game) and select switch profile. (NOT CHARACTER!!)

Select your profile again and select the character you've played with.

It should pop up now.