Este parece ser o que você está procurando, é para o Outlook 2003, mas menciona arquivos PST, então os dedos cruzados:
link
You need to go to Control Panel /mail **bit/Double click and if your Outlook is configured you will see your profile. Double clic the profile and add the data file (pst) (Browse to folder that you copied it).
If you did not create a new Outlook account, open Outlook then close it without creating account. Go to controll panel / find mail ** bit, double clic, create a profile and browse for your data file that you copied to another drive.