Les he wants to host the image on Tinypics not on the ME site
As Tinypics is part of Photobucket I'll assume they are the same, once you have your photo on Tinypics you should be able to copy the "direct link for layouts" or url of the image.
When you get to where you want the photo in your reply click the little icon of a landscape next to the camera icon and paste the "Direct link" there.

J
Edited By JasonB on 05/03/2013 20:09:54