1. Copy igXXXModel.pas, igXXXModel.dcr files  
   from "Ext" subdirectory to Data Navigator directory.
2. Start Delphi or C++ Builder and select "File", "Close all" to 
   close all opened files. 
3. Select "Component", "Install component" and "Into existing package". 
   Select igXXXModel.pas from the Data Navigator directory for unit file 
   name and igDataNavigator.dpk for package file name and press "Ok" button 
   in the component dialog box. The compile dialog box will be shown.   
   Now press the "Yes" button in the dialog box.  
