I'm going to reply in two posts. The first is to tell you whether or not you can input pictures into the forum.
My suggestion is simply attach the picture as a file attachment.
As you can see, the file attachment is a picture and that picture can be viewed by simply clicking.
I tried to figure out what the forum uses for coding. There are so many different scripts. I'm going to have to ask them what the scripting code they use is so I can input files and make HTML/XHTML/XML/CSS/CSS2/CSS3 modifications. Depending on what people use.