[img ] and [/img] tags around the web address.
when viewing a picture, right click it, go to properties, highlight the address, right click the highlight, click "copy", push "ok", go to interference and put then the address here then[/ img], if you're in full reply mode, you can just push the "img" button and it will do the tags for you.
but don't space anything in the tags like i did. i had to space it so it would show up for ya.