A series of Microsoft kb articles that provides information and procedures for implementing Microsoft Windows NT 4.0 Profiles and Policies on client workstations and servers:
Guide To Windows NT 4.0 Profiles and Policies (Part 1 of 6)
Guide To Windows NT 4.0 Profiles and Policies (Part 2 of 6)
Guide To Windows NT 4.0 Profiles and Policies (Part 3 of 6)
Guide To Windows NT 4.0 Profiles and Policies (Part 4 of 6)
Guide To Windows NT 4.0 Profiles and Policies (Part 5 of 6)
Guide To Windows NT 4.0 Profiles and Policies (Part 6 of 6)

There is a good tutorial to System Policy Editor on http://www.elkantler.net/security/security.htm

University of Dundee's Windows NT Policies