Originally Posted by Pizzle
You can't really create "folders" per se, but I think what you're asking to do, you can do.
Click trackwheel and go to search. Craft your search using the criteria that you want to show (example, e-mails only FROM a certain e-mail address). Then, instead of searching for it, click save. Assign a key to it, so that when you hit Alt and that key, it will filter that custom search.
Hope that helps.
Exactly what I was looking for/trying to remember.