To post imges, the first thing is to resize them so they aren't too big. 600-800 pixel wide will work. The forum software will still scale them down a bit to display them, but clicking on them will show the full size.Unless hosted somewhere else and you put in links, you can only put in one pic per post (bummer)
When creating a post, there is an option tab. on there is an add/update button, which opens a small window where you can browse to your pic. You may need to scroll to the right to see the save button. Once in uploads the photo, you can post it.
I keep thinking I will make a pdf with pics, that explains it all... but I haven't gotten around to it yet.
Bruce