Rocky'smomma, you need to have your pictures on a website like Image Station . I uploaded Rusty's picture into my album. You will need to go to User CP, then click on Edit Profile. In the signature field, you will have to enter the URL for the picture preceeded by [ IMG] and a [/IMG] at the end of the URL. (No spaces in [IMG])

The URL for Rusty's picture that I uploaded is:
http://www.imagestation.com/picture/...0/fcf7e76a.jpg