Doing it the Bushfiva way the Outlook.pst will be located in something like:
C: \Documents and Settings\. . Your Login name . .\Local Settings\Application Data\Microsoft\Outlook\Outlook.pst
That's in XP - can't remember the W2k location.
If you want to keep the existing .pst on PC2 then rename it or put it in a temp folder. Copy the desired .pst file to the same folder in PC2.