Custom Images Below x usergroup
 

Im looking for a modification that will allow me to put an image below an avatar on x usergroup or the ability to add them to certain peoples avatar.

Example: http://www.xboxusersgroup.com/forums...d.php?p=407522

Under peoples avatars there is images such as http://www.xboxusersgroup.com/forums...ontributor.gif and other images to represent they have contributed or won something....

How would this be done?

Thanks, hopefully someone can help as this would be a very good addition to my new forum.