Adding Network Folders to Folder List

Is it possible to add a network data folder on another server to the Outlook folder list? I need to have an easy way for users to drag mail messages from their Outlook Inbox into the network folder without using the cut & paste method. We have Outlook public folders set up, but we would prefer to keep all files (including email messages) in one central location.
My environment includes: Windows 2003 domain with Active Directory, Outlook 2002, MS Exchange Server 2003.