Before end users can begin independently recovering shadow copies, the shadow copy client software must be installed on their computers. If an earlier version of the shadow copy client software is present on the computer, the client software must be updated.
The shadow copy client software can be installed on computers running Windows 2000, Windows XP, and Windows Server 2003 with SP1 or later. You can download the client software...
Vanilla - Windows 2000/XP/2003 client for Windows Server:http://www.microsoft.com/technet/downloads/winsrvr/shadowcopyclient.mspx
Updated - For Data Protection Manager 2006 and Windows Server on Windows XP or better:http://support.microsoft.com/kb/903234
More instructions/details:http://www.microsoft.com/technet/prodtechnol/dpm/proddocs/7efd2456-8882-411c-8189-303859d4fa42.mspx?mfr=true