Saving Emails From XP to Vista

Hi,
For years now I have known where Outlook Express saves the emails, but when I installed Vista, Outlook Express has gone and its a new bit of kit. Does anyone know where it saves the emails so I can apply all my folders and emails from Outlook Express to the new software.

Failing this, does Outlook 2007 save the emails in the same place as Outlook Express then I can just use that instead.

Thanks
Dave