I refuse to condone this crap on the boards. However, if I were condoning this crap - which I'm not - I would tell you to first download the photo to your hard drive and make sure it isn't too big (preferably under 100 K). Then when you first post (you can't do it from an edit), attach the photo to the post using the "browse" button at the bottom of the screen. 0 bites means that the size isn't limited, because we assume people will use good judgment.
You know, good judgment. Like not posting embarrassing photos of a sensitive, charming Administrator.