Actually, I think you can add your photo to your list if you have posted it elsewhere on the site. If it's in the database, you can copy and paste the db link (the BB code, which looks like this):
Or, if you've posted your photo somewhere else on the site, copy the "lightbox" dialogue, which looks like this (if you hit "quote" in the thread or Tree-mail where the photo appears, you'll be able to copy and paste the link into the comments section of your list)
(Heh, to make it easy to find, I T-mailed the photo to myself.)
A teeny bit involved, but once you get the hang of it, it doesn't take long.
Anyone know of an easier way?
Edited to add: forgot to include a photo of where the DB code is in the database. sigh.