mcarterbrown.com - FAQ
Scroll down the the bottom, and look for:
How to Insert Images into Your Post
It's the only post in the FAQ with pictures. Now that being said, if you are a brand new member with not enough posts, you may not have that ability as of yet. After two weeks and I believe 14 posts, you should gain that ability to post images.
Otherwise, host the image elsewhere, and use the [ img ] your image.jpg [/ img ]