Before HPCA version 7.90, it was necessary to manually modify and rename files used by HPCA to support unattended installation of a particular OS image.
Now, you can specify the source of this information when you run the Publisher. This new method is much simpler and less prone to error than the manual method. It is the preferred method for specifying this information.
For backward compatibility, the old method is described in an appendix to this guide. See Customizing the Windows Answer File.