If you go to User CP, go to avatar... You can pick a picture there for your "screen name" on dis or you can upload a picture from your computer right to it (depending on size)
as for the signature... Click on User CP again, go to edit signature and you can add a ticker or if you would like to add some signature icons, you can do that as well. I sent you a pm for a Christmas tree... you can see how that works...
Hope this helped!
Thanks for the help, as you can see it worked! and thanks for the tree! Love it and already passed it on! I love your mouse smilies, I would love to know where did they came from.