Go to the "+ add reply" button to the bottom right. Click on the mountain looking icon and place your link between the "img (insert link here) img". Then you are ready to go.
Then you have to go onto a free picture hosting site like photobucket.com and upload your pictures, obtain a link, then proceed with the directions I gave you.
Try This Follow the directions up to the point where you are copying the file from the photobucket account. The only thing you do once you highlight the "direct link" option in Photobucket, is paste that link in between the "img" tags. I will get around to making a writeup for this site similar to the one in my signature, but that should hopefully get you started.