Originally posted by Craftlady
In the signature area just copy/paste the URL for hwere the photos are located. It's the same principle if your posting a photo but your doing it in the signature box.
Go into User CP (button up top next to the "home" button) and click on "Edit Profile". There, in the box for your signature you can put the same *[IMG]* (without the stars) then the picture link and then the close IMG instruction *[/IMG]*. Click on save changes and - voila! your signature block will be set for all messages you post until you change it again.