lol I see you're trying Emma. Try not to double post btw. It's alot easier to get the signature to work right if you just create a photobucket account and just upload the photo their and get the code since it gives you the code you need automatically.
If you don't want to do that though all you have to do is copy the url of the image you want and put your url of the photo you want in your siggy between this:
First type: [img]
Then right after that paste your url
Finally after the url type: [/img]
So you should have this:
[img]PASTED URL HERE[/img]
After that save and your image should work Hope that helps you Emma.