I use Gyula's navigator for that. It has a button that compares the contents of the right pane to the contents of the left pane. It's a free download, so why not try.
http://www.tucows.com/preview/195761
Kees
hi
How can I find what files in Folder A that does not exist in Folder B?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic