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Microsoft Resource Kits - Windows NT4 Resource Kit

Regkey.exe  (Windows NT4 Resource Kit)

The Window Server NT4 Resource Kit is a set of tools that NT domain administrators and engineers use to manage or support a Windows NT4 domain. Use it to streamline management tasks such as troubleshooting NT4 OS issues, managing an NT4 domain, and configuring networking/application services.
Regkey.exe
Graphical utility to modify the registry to change settings for the shutdown button on the logon screen, to display the last logged on user, whether to parse the Autoexec.bat file for path and environment variables, to specify the number of profiles cached, to specify the default wallpaper, and whether to generate long file names on the FAT file system.