you do know phpBB has this nifty thing called a signature where if you want the same thing to appear at the end of every message, you don't have to type it each time? it's really easy, you should try it!
oh and speaking of avatars, i found you one to use.
http://www.studentkareniboras.se/for...avatars/79.gif
i think it looks a good deal like you, don't you think?