Hi Steve,
(You Wild and Crazy Guy;-)
It's not that difficult. Just copy the 'image' from whatever host sight you use. In the reply section push the "Go Advanced" button. There's a yellow button on top just to the right of center with two little mountains. Click on it and 'Paste' your link in the field. At the bottom of the page there's a 'Preview Post' button similar to the old Joustericon site.

There's other ways to post photos here, but the 'mountains' seem easier than browsing to me.

Give it a try. I'd really like to see the photo he sent you!
~ Harlan