Well I tried the same a week back but the codes didn't seem to work...
Then I looked at the "reply to message" box that appears when you reply to a thread; under the white window on the left, it says "Click here to upload!", you do and don't forget to click "Embed picture in post", it will do the same as Photobucket used to do...
You've gotta use the Direct Link code in Photobucket. Click the button to the top right with the little mountain in it, paste the code in the box, click OK. Should work for ya.