iPhoto and Aperture do not allow me to organize my photos using a key photo to represent my folders. I want to view all my folders (filled with grouped images) in a browser window where I see only a key image representing what's in the folder. iPhoto does this with events (projects in Aperture) but they do not allow this feature when I scan my folders. With thousands of events/projects it's impossible to browse my folders easily. Is there a photo organizer or plug-in that allows me to do this? I do not need editing features. I also have Expression Media 2 with no luck.