..............  when you start a new reply or thread you take your picture link from imagecoast or imgur or wherever you host your pics and you take the usually called "direct url" and copy&paste it in the picture url area (just above post message) ............... you can only do one per post but you can just keep replying to your own ad when you want to keep adding new pics. You might want to contact a mod to get yourself a  "do over" on your provider ad if possible.