If you need a process to find and install drivers post process (after Windows or later as an update)

1. Populate this key with a path to your drivers
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\UnattendSettings\PnPUnattend\DriverPaths\1
   Path = “d:\Drivers” <- String
   
2. From a script, batch, MDT, setupcomplete.cmd, whatever, Run pnpunattend.exe
   (built into Windows 7 and also there for Vista )
   

Example: Pnpunattend.exe auditsystem

You can use /s to just search the drivers but not install.  Also, use the /L to output to command so you can pipe into a file if needed.

USAGE:

   PnPUnattend.exe [auditSystem | /help /? /h] [/s] [/L]

       auditSystem   Online driver install.

       /help /? /h    This help.

       /s             Search without installing.

       /L             Print Logging information to the command line.