C:\WINDOWS>REG SAVE /?

Console Registry Tool for Windows - version 3.0
Copyright (C) Microsoft Corp. 1981-2001.  All rights reserved


REG SAVE KeyName FileName

 KeyName    ROOTKEY\SubKey
   ROOTKEY  [ HKLM | HKCU | HKCR | HKU | HKCC ]
   SubKey   The full name of a registry key under the selected ROOTKEY
 FileName   The name of the disk file to save. If no path is specified, the
            file is created in the current folder of the calling process

Examples:

 REG SAVE HKLM\Software\MyCo\MyApp AppBkUp.hiv
   Saves the hive MyApp to the file AppBkUp.hiv in the current folder



C:\WINDOWS>REG LOAD /?

Console Registry Tool for Windows - version 3.0
Copyright (C) Microsoft Corp. 1981-2001.  All rights reserved


REG LOAD KeyName FileName

 KeyName    ROOTKEY\SubKey (local machine only)
   ROOTKEY  [ HKLM | HKU ]
   SubKey   The key name to load the hive file into. Creating a new key
 FileName   The name of the hive file to load
            You must use REG SAVE to create this file

Examples:

 REG LOAD HKLM\TempHive TempHive.hiv
   Loads the file TempHive.hiv to the Key HKLM\TempHive



C:\WINDOWS>REG UNLOAD /?

Console Registry Tool for Windows - version 3.0
Copyright (C) Microsoft Corp. 1981-2001.  All rights reserved


REG UNLOAD KeyName

 KeyName    ROOTKEY\SubKey (local machine only)
   ROOTKEY  [ HKLM | HKU ]
   SubKey   The key name of the hive to unload

Examples:

 REG UNLOAD HKLM\TempHive
   Unloads the hive TempHive in HKLM