If you mean Avatar you can't you need to be a Donater and to be a Donater you need to donate atleast 15 $ to become one.

hey how do u change ur main pic?

Ha.. Very nice man. I seen it before but thanks for sending me it ;]

Bro Code don't work.. only BBCODE is aloud..

So just send the URL not the Embed Code

<a href="http://media.photobucket.com/image/the%20joker/sarsenal14/joker.gif?o=71" target="_blank"><img src="http://i221.photobucket.com/albums/dd137/sarsenal14/joker.gif"></a>