still, not working.
I don't know what's wrong with it, but I just put in that code and when I did "preview signature" it showed up right, but it's right back to the link. I don't know what I'm doing wrong, but apparently I'm doing something. Here's the code I used:
<img src="http://img101.mytextgraphics.com/photolava/2007/03/24/notallheroes-45ww1kvx7.jpg">

... and this is why I came to you