lol, you're like the 10th person to ask me within the last 24 hours. I don't judge myself so I couldn't say but my pic is in my profile, just edited the mask and headband on, and I posted a pic last night in the pic thread.
Sure mate. At the very top of the webpage near your avatar you will see a "settings" tab. Click that, then scroll down to "my settings" you will see a option for "edit signature" click that. And voilà!