I know it's been covered multiple times. One would hope that search would find it...
[list type=decimal][*]Open an account at Photobucket.com[*]Upload your picture(s)[*]In the album view, or when looking at the picture there, there are four textboxes there, one of which is labeled "Direct"[*]Copy the "Direct" address (it'll show "http://....")[*]In the forum here, when entering your comment, there is a picture of a tree above.[*]Click the tree, then paste into the "enter the URL of your photo" text box.[*]Done.[/list type=decimal]