When you want to upload a pic from your computer, go to either the "Post Reply" or "Go Advanced" links at the bottom of the page. Don't go to "Post Quick Reply". When you get to the page where you post your reply, there is a little button at the top of the text box that looks like a little paperclip. Go to that and click the browse button under "upload file from your computer". Then just select the file/s that you want to post and click "Upload". That will put all your pictures at the bottom of the page. Or, you can upload your pictures to a site like www.photobucket.com
and copy and paste them from there.