Switch PC Address Book to Mac?

OK, I switched to Mac. I got myself a great Powerbook G4 17" at the Computer fair at TWTC.
Now, how do I get my address book from my PC Outlook XP to Mac OS 10.3 AddressBook?
From the Apple site “Switch” it looks very simple up to the point of dragging all the sellected adresses in the addressbook on the Mac, but NO, no, no!! it tells me I can’t do that. The extension on every card is .msg the error message is “no importable cards were found”
can anyone help me? I don’t want to rewrite my 200 or so addresses.

check to see if the pc e-mail client you’re using offers any address export options. which client is it btw?