Use the following batch file (add to filename.bat):
REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Applets\Regedit /v LastKey /t REG_SZ /d Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Veritas\NetBackup\CurrentVersion\Config /f
START regedit
to replace:
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Veritas\NetBackup\CurrentVersion\Config
with your registry path.