You can attach it to your post. When you have your posting window open, scroll down to where it says manage attachements.
Or...go to
www.tinypic.com, click the browse button, select your photo, then click "upload". A window will open up where you have to type in a captcha code, do that, and you will have several links show up that you can use. The one for posting in forums is the one with the image tags in front of and behind the web address of the image [img]webaddress[/img].
You copy and past that line into your post.
Like the very next post I am making.