Sync a Public Folder Calendar to Personal Calendar

My bosses calendar is in a public folder that is shared with a few users. (Exchange 2003 & Outlook 2003). He just got a Blackberry & I have set it up for OWA. However, we can’t pull up with public folder using OWA on the Blackberry (confirmed w/Blackberry – we are not using the Blackberry Server). Is there a way to sync the master calendar with his personal calendar? Thank you for your help!