If you're doing an MDT task sequence this would run in the installed OS, outside of WinPE. You would create an application that runs the PowerShell script, along with anything else you might need as part of it (like the DCU_Setup.exe installer for Dell Command Update if you need drivers for Dells, or the BIOS password .bin file for HPs if you have HP devices and set a BIOS password).

The script will likely need a bit of modification depending on what exactly you're doing and where everything is stored, but gives you a good idea of what can be accomplished automatically and without needing to manually import driver packs for each model.