Can you set a password on a single folder in outlook 2007

We run an exchange 2003 environment with outlook 2007 clients. I need to add a single password to a single folder within the pst not on the pst itself. About 10 different people need access to this mailbox on the computer so it is inconvient to keep logging out and logging back in as a different user. Some jobs need to be put into a password protected folder is this possible?
Any help would be appreciated