Mac OS 8.6: Updating A NetBoot OS Image

I want to update the System software image on my Mac OS X Server NetBoot server. Which installer should I use?
If you are the administrator for a NetBoot-capable server, do not use the Install Mac OS 8.6 Installer. Instead, use the "Update to Mac OS 8.6" Installer.
Published Date: Feb 18, 2012