When you make the GPO for the assigned application, there is a deployment tab within the GPO properties. At the bottom of the tab are two Installation user interface options. If you select Basic, the user will not be presented with any user prompts other than the ability to cancel out of the installation. You may need to perform an Administrative Installation of the applications MSI file with the answers for the user prompts such as a license key, name of the organization, etc. Jeremy talks about this process in Chapter 11 of his book.