For those of us with big red X's are sigs
 

Ok, from what I know, there is a way "around" the error giving by Angelfire and other such services that don't allow remote linking.

Simply create a text or html file and insert the code for the graphic there.

I'm really not entirely sure how this works, if someone else can explain it any better, feel free to do so!

No no, that just changes the text into HTML, so the computer recognizes it as HTML. Remote linking cant be hacked/what ever, unless you personally go to their computers in their offices, and change it.