PST Password
PstPassword is a small utility that recover lost password of Outlook .PST (Personal Folders) file.
This utility can recover the PST passwords of Outlook 97, Outlook 2000, Outlook XP, Outlook 2003, and Outlook 2007.
You don't have to install MS-Outlook in order to use this utility,
You only need the original PST file that you locked with a password.
For more information, visit,
http://www.nirsoft.net/utils/pst_password.html