Do you have an account with photobucket? If not you need to, when you register (if not already in) you should upload your pic, generate the IMG code, and then you copy and paste the code to the site, preveiw the message before you post (It's better to preveiw before you post).
I have been using photobucket for a long time for storing my pictures. It's worked out very well for putting pics on this site with my posts....and it's free.
First go to http://www.photobucket.com and create an account. Then upload your pics from your computer into your photobucket account.
Once you have them loaded, underneath each one will be an html address. Then:
1. While typing the body of your post on this site, click the "Img" button above.
2. Copy the html address under your photo on the photobucket site into the body of your post on this forum (right after you click Img).
3. After pasting, then click the "Img" button above again.
4. When finished with entire post click "Submit".