Its pretty easy. When you type a message in here and scroll down to send hit "Go Advanced" instead of send. It will take you to another line that says "manage attachments" and you have to put in a "title". A new window opens and you click on "browse". Find the picture file you want to upload and click on upload then when it says "file uploaded" you can click on the close window tab and then just click submit reply and you picture should show up.