'Sup Lindsay!
webgirl and crunky posted some easy-to-follow instructions on how to add an avatar under your username in the signature testing forum, here's the link: http://www.activeboard.com/forum.spark?forumID=21493&subForumID=28760&action=viewTopic&commentID=436283&sparkKey=f2c06b909dcf4894be32fca31b0bd3bfb0&abKey=9618ed297d5cda20e94b57b38edc5b84
Hope this helps!
Mac and CHEESE