Two ways to go:
Browse For Avatars: Browse through our Avatar categories to find the avatar of your choice. With dozens of categories at your fingertips, you will be able to pick someting in no time! Browse >>	Search For Avatars: Already know what you want? Save yourself some time by searching for it! Enter a term below and click the button to see if we already have what you need:

Once you find the avatar you wish to use, simply click into its Details page, and then click the link "Set to Chatterbox" under its picture.