Download Photobucket, hit Upload Media and hit Choose Existing. Choose a photo and upload it, once it's done processing, go to Albums and refresh the page. Click on the latest photo(which is the one you uploaded), hit the "i" on the bottom right corner and hit the IMG code to copy it. Come back to PIMD and paste the IMG code in a post and the result will be the photo.
Too complicated? if you have KaW there's a Photobucket guide thread.