You never Import/Export a pst file
http://www.howto-outlook.com/howto/backupandrestore.htm
This Q is posted every day, as is the response
> My desktop PC has died but the Hard Drive is still good, so I have put it
> into a 'caddy' and connected via USB to my laptop. What I want to do now
is
> to transfer my desktop's Outlook 2002 calendar information to Outlook 2002
on
> the laptop PC; but I don't know how to find it. I have succeeded in
> importing archived material, but the up=to=date stuff that I entered recently
> isn't there. How do I find it, and how do I import it?