For those of us who refuse to "up"grade to the new (horrible) Office 2007, here is a patch that you can run that will allow you to run files created in Office 2007 if you have earlier versions such as Office97, 2000, 2002 XP...etc

http://www.microsoft.com/downloads/details.aspx?familyid=941B3470-3AE9-4AEE-8F43-C6BB74CD1466&displaylang=en