Tried to embed a photo, but the link is 20 pages long and doesn't work at all. It's the most difficult photo site I have run across.
Once your photos are on a photo hosting site (such as Imgur.com; Postimage; Dropbox, etc. Photobucket), or on virtually any site, including this site's album such as eBay, Amazon, you-name-it, select the full sized image, then Control-click (Mac) or Right-click (Windows) on the image itself, then choose copy image location. Now paste that URL (the full web address, which should end in .jpg) into the IMG box in the reply window of the thread you're posting to.
The site's album is also a good choice for displaying photos.