The only pic you can include in your sig line is one of the board smilies. The avatars can be changed to any pic you want.
If you click here
, you can see a listing of all the smilies. To the right of each smiley is a text name for the smilies. Copy the text name of the smiley you want to use and paste it into where Krissy said, the "edit signature" box. Let me know if you get it!