OI a picture lemme think <img src="/images/graemlins/tongue.gif" alt="" /> first go to "my profile" on the top of the screen, from there go to "view/update profile" and over there go to "select a different avatar image" on here just copy/paste the url of the picture you like and then "choose that avatar" and voila u have yerself a picture <img src="/images/graemlins/tongue.gif" alt="" /> well that was for avatar, now for signature.
In the place where you can write something for your signature just enter this [ IMG ] but if you write it there do it without the spaces inbetween, then enter the url of the picture behind it (WITHOUT SPACES <---) and behind th url enter [ /IMG ] again without the spaces. And there you go <img src="/images/graemlins/laugh.gif" alt="" /> if you're still havin trouble with it then just err ask again <img src="/images/graemlins/tongue.gif" alt="" />