Marty List brings us ModifyProfile.zip.

The ReadMe.txt contains:

Modify Profile \[version 1.20\]


Loads Registry hives and modifies profiles for users who are not currently
logged in.  Can also be used to modify new user profiles (Default User).

Syntax:  ModifyProfile.exe /PROFILE:profilename|ALL /REG:filename /KEYNAME:name


Examples:

ModifyProfile.exe /PROFILE:ALL /REG:"C:\TEMP\New Stuff.reg" /KEYNAME:TempHive

ModifyProfile.exe /PROFILE:"C:\Documents and Settings\Default User\NTUser.dat" /REG:C:\TEMP\NewStuff.reg /KEYNAME:TempHive


The /REG parameter must be a valid .REG file able to be imported by REGEDIT.EXE.
The key name must be listed under HKEY_USERS and must match the name specified
in the /KEYNAME parameter.  Example:

  Windows Registry Editor Version 5.00

  \[HKEY_USERS\TempHive\Software\Optimum X\Modify Profile\1.20\]
  "Value"="Data"

An argument of /PROFILE:ALL will modify all existing profiles and Default User.
An argument of /? or -? displays this syntax and always returns 10.
A successful completion will return 0.

Copyright 1999-2002 Marty List
To add Key AAA to the Software hive of user testpwd and add Value Name bbb under AAA:
modifyprofile /profile:"C:\Documents and Settings\testpwd\NTUSER.DAT" /REG:C:\ZIPNEW\temp.reg /keyname:TESTHIVE

where temp.reg contains:

REGEDIT4

\[HKEY_USERS\TESTHIVE\Software\AAA\]
"bbb"=dword:00000000

The program displays:

==========================================================================


Modify Profile version 1.20

Profile that will be modified: C:\Documents and Settings\testpwd\NTUSER.DAT
Reg file that will be imported: C:\ZIPNEW\temp.reg
Name that will be used when loading the key: TESTHIVE

==========================================================================

Loading hive C:\Documents and Settings\testpwd\NTUSER.DAT
Importing C:\ZIPNEW\temp.reg
Unloading hive C:\Documents and Settings\testpwd\NTUSER.DAT


Successful.

Process is exiting with a return code of 0.