First off, the NAV Parent server doesn't need much, and certainly doesn't need a dedicated server. Mine runs on a 233 Mhz and doubles as a RAS server.
Secondly, you don't have to use live update for pattern sharing. You can do manual updates. By pattern sharing, you can push out the pattern to every machine in minutes without requiring any of the machines to run a logon script or reboot.
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Give a man a fish and he will be back for more. Slap him with a fish and he will go away forever.
