Useful Windows Installer Information
Link to the Windows Installer 4.5 SDK: http://msdn.microsoft.com/en-us/library/aa372866.aspx
List of Windows Installer default properties: http://msdn.microsoft.com/en-us/library/aa370905.aspx
List of Windows Installer operators for conditional expressions: http://msdn.microsoft.com/en-us/library/aa368012.aspx