In Windows 2000 and Windows XP, you cannot separately enable / disable Client for Microsoft Networks and File and Print Sharing for Microsoft Networks because Group Policy only uses a single bit to store the enable / disable setting for both features.
To workaround this behavior, you could open the Rasphone.pbk and locate NETCOMPONENTS=.
Change the ms_server=n and ms_msclient=n
where n is 0 for disable and 1 for enable.
NOTE: You can copy the Rasphone.pbk file to individual users at "%UserProfile%\Application Data\Microsoft\Network\Connections\Pbk\Rasphone.pbk".
NOTE: Proxy settings are located in the registry at: