How to transfer Multiple accounts from Mac Postbox to Outlook in Windows ??

I have around 5 email accounts that I access at regular intervals in Mac Postbox. I have managed to keep these accouts from years and maintained several email in different folders. Now I am about to give away my mac book and switch over to windows laptop. All I want is to transfer the emails from Mac Postbox to Outlook 2010 in windows. I have transferred the database files of each account from mac to windows laptop but dont know how to import these to Outlook 2010. These is no such option to import the postbox files in Outlook 2010.
Please help me Migrate all the Postbox database to Outlook 2010.