click reply, scroll down, click the "manage attachments" button, click "browse" button on the pop-up, and find your pic, then click upload... that should do it...
VolsRChamps! Nice picture from the River! I have one that I love from when I rode up with the VolNavy for the LSU game in 06, but it is very similar to the one you posted so I won't go through the trouble of scanning it and posting it k: