Hi,
If you don't want to perform a silent installation of the main installation package, then you can add the Web-Deploy-Package as a
feature-based prerequisite. The feature-based prerequisites are launched right before the main installation when performing an installation with Full UI of the main installation package.
Since the feature-based prerequisites are installed before the main installation package, then you can add additional files from the main installation package.
You can also take a look on the
Feature based prerequisites in quiet mode forum thread which may be useful to you.
Please let me know if that helped.
Best regards,
Dan