These new forums are much easier to use than our last ones, and I will be backing it up regularly to make sure we don't lose any pictures.
To add pictures, simply Reply or post a New Topic. At the bottom go to Upload Attachment, click Browse, find your first picture, give it comments if you want, and click Add the file. Wait for it to finish. Then go to your next picture and do the same.
It will automatically make a smaller thumbnail and put that in the message. If you want the fullsize in the message you can click Place inline and it will put it in the body of the message.