File > Open > Outlook data file...
Take a look at these pages for info on Outlook data backup or transfer:
http://www.slipstick.com/config/backup.htm
http://www.howto-outlook.com/Howto/backupandrestore.htm
http://office.microsoft.com/en-us/assistance/HA010771141033.aspx

Signature
Russ Valentine
[MVP-Outlook]
>I had to recover my system recently and I am trying to get my pst files
> reloaded into Outlook 2003....