OS X v10.7 entourage 2004

I have recently upgraded to Man OS X v10.7. Unfortunately, I realized that my ms office 2004 programs are no longer supported by the new OS and I lost access to my email archive on entourage. Would somebody have an idea how I can import the old entourage archive into Mail? When I select "Import Mailboxes" and then "Entourage", the program wants to open my entourage which doesn't work anymore. Any hints? Thanks.