you can upload them to a pic-hosting site (
http://tinypic.com/), then paste the URL they give you here. You'll want to surround the image with [img] and [/img] and it will take care of the rest.
Example:[IMG]
http://i55.tinypic.com/ra9qnb.jpg [/IMG]
Take the above spaces out that I placed after and before the [img][/img] and you get:
