Importing Entourage 2001 email into Outlook 2003

[Kari]

Hi,

I have someone who used to be a MAC user who used
Entourage 2001 for his email. He has recently purchased a
PC and needs to import his saved email into Outlook 2003.
We have saved the Main Identity folder from Entourage, but
we can't figure out how to import it into Outlook 2003.
Does anyone know how to do this?

Thanks!