Assistance with understanding a silent install for Windows10

Hello,

I am trying to get my head wrapped round what it is I need to do and in what order!!

So far I have done this

* Installed Windows 10 on a virtual machine
* Changed group policy so Windows Firewall and Cortana is turned off (just testing)
* Ran sysprep /generalize
* Rebooted into WindowsPE and succesfully converted to a wim file using ImageX
* Saved the WIM file onto the standard iso and renamed to install.wim

So my question is this - How do I generate a silent install? I am really confused where it has to go.

I have tried unattend / autounattend (whats the difference?) and placed it into the root of the Windows ISO.

Thank you.