Hi,
Don't know any exact solution to your problem but maybe you can export Outlook mail boxes to a more usable and universal format like the unix mbox format used by Netscape too.
I had such a problem before Netscape 6.0 was released. Outlook (Express in my case) can import Netscape mail boxes but, of course, doesn't offer the choice to do the other way. Now Netscape 6 can import Outlook mail boxes and store its boxes in easily parsable files (unix mbox format).
Maybe it's an easy way to go for you?
--Gildas.