Generating Office Documents using the New Open XML File Formats

Windows SharePoint Services 3.0 introduces powerful new integration with ASP.NET Master Pages that makes it easier than ever to customize and brand Windows SharePoint Services sites. This tutorial explains the difference between page templates and page instances and shows you how to customize the Master Page and content pages of a Windows SharePoint Services 3.0 site.
<%System Drive%>Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\TEMPLATE\GLOBAL\
folder.". So now my installation is hosed, and I'm wondering why yours didn't break.