Hi Jason
You might want to try 'Software Update Services'. NOTE: It's, however, not
possible to apply Service Packs using SUS.
"Microsoft Software Update Services (SUS) is designed to greatly simplify
the process of keeping Windows-based systems up-to-date with the latest
critical updates. SUS enables administrators to quickly and reliably deploy
critical updates to their Windows 2000-based servers and Windows 2003-based
servers as well as desktop computers running Windows 2000 Professional or
Windows XP Professional."
Download and more information here:
http://www.microsoft.com/windows2000/windowsupdate/sus/
Hope this helps. Regards,
Fabio