When you go to the place you change your signature, down further there is a spot where you can upload your picture to your signature. Sadly it doesn't work with URLs, you have to use BettaFish.com to upload it :) Hope this helps!
Yep):. I still can't get over his death.. He didn't float up to the top when I moved the rock/plant he was stuck under.. He was just like laying on the bottom, and when I took the net to get him out, he fell out, and just sunk to the bottom again.