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Automating Software Update downloads - Macworld
http://news.google.com/news/url?sa=T&ct=us/3-0&fd=R&url=http://www.macworld.com/article/134940/2008/08/automatesoftwareupdate.html&cid=1235999110&ei=ZTShSLbQBZao-QG_qZHbCw&usg=AFQjCNGz2z45v9zNY3vldrTZ_95sSAOonw