Posting an image to a website is a little different than sending one by email.

To put the image in the website you need to post save the image on a webserver, then tell the website the address for the image.

In order to that for the ChipBoard you place the web address in the Optional Image URL Box which is below the post entry screen.

If you need a place to save the image, Greg provides space.

See his FAQ http://www.chipguide.com/faq.htm