Here’s a short guide that was a bit too much to fit into the reference materials section.
I had been asked to install Classic Shell on some laptops and tablets for deployment. As part of the deployment process, I went ahead a built in into the reference image that would be used. In order to prevent the Classic Shell welcome screen from appearing at first logon I added the configuration registry keys to the default registry hive.
The below script will mount the default registry hive, insert the keys, and unmount the hive for you.