Yahoo Email Plus in Outlook

I tried to setup Yahoo Email into outlook 2007, easy, right?
Here is the link for the detail

But then I realized that I also want to sync my Yahoo folders (other than inbox) too, and I am stuck. That's the point I realize the different between pop3 and imap4. And Yahoo only provides pop service, that's why I could not get my Yahoo folders. But I know I could get all my Yahoo folders in my HTC EVO, then I go ahead to check the settings, I realized that in my HTC EVO, the setting are the followings:
IMAP Server: android.imap.mail.yahoo.com
Security Type: SSL
Server port: 993
android.smtp.mail.yahoo.com
SSL
465

I also know Dovetail Email could also download folders, wondering what the setup?