To post photos:
Click "Additional Options"
Click Browse, and find the photo on your computer
Select the photo
You are returned to this screen
The photo name should appear in the "Attach" field
Click Post
Its fairly simple. The only thing is, your photos must be less than 125 kb. If your photo is bigger that 125, make a copy of the photos, and resize the copy (dont resize the original!)
Good luck!