Hi Cathy,
Yes, there are tools available that can easily find the password
in an Outlook PST file. Try a search on google, but be careful about
running any programs that mnay corrupt or change the file.
Or you could just use a standard password recovery service:
http://www.intertek.org.uk/services/
N.B. Please do not crack any password unless you are fully authorised
to access the file.
C.B.