Just use the image button and put the URL of the picture you want to post.
[IMG] [/IMG]
My pictures are located on my web site so I just put the image address between the above tags....
So, the URL (address) of one of my pictures
http://www.tjshangar.net/Models-A-J/...ce/F-BVGAa.jpg
Looks like this when I put the tags around it:
