To add your graphics to a message board entry .. get the page up that you type your messages in ready to send.. left click on the yellow envelope below where it says Font Style.
A new screen shows up
Click on my computer
Then Browse and find where your graphic is that you want to send (I usually have things I want to send on my desktop as they are easier to find)
When you locate your graphic and the path shows in your browse line
Click add Photos
Just be patient as each step may take a few to load..
Click add Photos.
It should show up in your message box that you type in to send a message.
then hit send..but make sure you put a subject in the subject line