The easiest way to post pictures is open a free photobucket account.
http://photobucket.com/. Once you have uploaded your photos to photobucket, move your cursor over the picture, a dropdown box will appear, go to the IMG code and copy it. In the body of your post, paste it, and the next time someone opens the post, the picture will appear. Sounds like a pane in the butt, but after you've done it, it's pretty easy.