To add pictures to a post it has to be in your photo album, your sportsmobileforum.com photo album.
Click the "My Album" link up above. Up load whatever pictures you want by clicking the "Upload Image" button. Give the picture a title, then click the "browse" button. Find the picture on your computer just like you were opening it in a program. Click the "Submit" button just like posting to a thread.
Now, once it's in your album there will be a little text field under it. You just copy that text and paste it into your message. It'll look something like.
Which translates to
When people read your post.