I've been trying to figure this one out for a little while. I got it so that I can post certain pics of certain types but not others. For starters, it has to be online on a page that doesn't require authentication to get to the pic. If it is the right type, you can post it using the "IMG" button on the post page. But, like I said, this hasn't been working consistently for me. Wish I could be more helpful. I'll let you know if I figure it out completely.
"The world would be a better place if everyone kayaked."-Brad Ludden (Valhalla)
"You only get one chance to run a drop blind."-DD