Hello!
I recommend following these guides.
https://forums.fogproject.org/topic/8889/fog-post-install-script-for-win-driver-injection?page=1
https://forums.fogproject.org/topic/11012/resolution-to-inject-drivers-in-windows-10-sysprep/5
Have worked for all of my models so far.
And all i need to do is keep my driver model repo in check.
Here is another approach.
https://forums.fogproject.org/topic/9859/post-deployment-driver-installation-using-powershell-scripts
Hope this guides you in the right direction.