Make sure you are getting the right picture urls, preferrably .jpg or .gif. Instead of "saving as" pictures, just right click on them and highlight/click Properties... once you do that copy the pictures adress. It isn't that hard, sometimes you got to make sure its an existing adress.
I tried using the img button and add file buton but the dont work.
As to img button - it is used to post links to the images. As to added file buton - you can add button by means of scripts, but we do not provide help with it. If there is smth else you need - be more specific. provide a screenshot, if possible.