Start8 preinstallation methods for new PCs

I am a system builder using the Windows Deployment Kit to preload systems for end users using Windows 8. Using the kit we preload all apps that are the same on all systems using scripts and then the system enters audit mode where individual differences are added.

Once the system is finalized it is then set to enter the end user OOBE mode (Out of Box Experience) at next boot.

I am looking for a way to automatically deploy the Start8 in demo mode for the audit process without the individual email registration needed for each system.

Then once the system has been set for the end user, run a script that will enter a valid activation without user intervention and be active on first boot.

The demo mode activation is preferred for audit mode since we sometimes reload the system due to a conflict or a configuration change.

I do not want to burn a valid license in audit mode till a system has entered the OOBE or final phase for the end user where the final Start8 activation is done without user intervention.

Anyone have any ideas?? All suggestions are appreciated.