Mac OS X: Setting a Software Update Server without Open Directory

Setting up a Software Update Server if you are using Open Directory is a fairly simple task.  Just open Workgroup Manager, connect to an OD server or the appropriate Directory Service and then click on the computer or computer group you would like to edit the software update information for and then click on Preferences.  Then click on Software Update and type in the appropriate URL.  But what if the system is not managed using Open Directory.  Well, that's when you would use ARD to send out the following command or run it on your GM at imaging time:

defaults write /Library/Preferences/com.apple.SoftwareUpdate CatalogURL "http://server:8088/";