Fran-- Here is a link to the FAQ, which tells you how to create a photo gallery.

Link

Or, you can just use the ATTACHMENT MANAGER to directly upload a picture to a thread. Just hit REPLY as normal and click on USE FULL EDITOR. That bring up up a screen which will show ATTACHMENT MANAGER just below where you would normally type your note. Click to open the Attachment Manager. Hit on Select a File to Attach and VOILA! Just upload your picture!