by Josh66 » 22 Aug 2012 14:48
You need to host the picture somewhere (Flickr, Photobucket, some place like that), then copy the image address (this will end in .jpg - right click on the picture and there should be an option that says "copy image location" or something like that) then paste that into the IMG tags.
It should look something like this:
[img]paste%20address%20here[/img]