From Al's excellent forum   :

1 Upload your photo to a free picture hosting site, this one is pretty good: http://photobucket.com/
2 You will then be given a direct link to your pic, e.g. http://i272.photobucket.com/albums/jj177/TheEndUK/beatles.jpg, copy that.
3 Go to the Beatle Forum, start a new thread or a reply.
4 Click the image button:  



5 This will appear:

[ img][ /img]

6 Paste the direct link of your pic between the brackets, like this:

[ img]http://i272.photobucket.com/albums/jj177/TheEndUK/beatles.jpg[ /img]

7 Post your message and your pic will magically appear like this: