Silent Post-Setup PowerShell script for all users

I would make an new thread but this thread might get more people attention who are clued up on the issue:

I want to make this part of my unattended install:

I am following a guide on how to customise windows 10. I have at least my storage drivers since they are compatible between windows 7 & 10. I have a copy of windows 10 pro and an activation code. I'm using NTlite to customise the .wim files. However the guy who wrote the guide said my question on how to use this script in my install was better asked elsewhere.

FYI this is the guide I speak of: