Installation Instructions:

1. Extract all the folders to the main game's directory.

There should be a dlc_shield folder in /The Witcher 3/DLC
There should be a modshield folder in /The Witcher 3/Mods
There should be a shieldBehavior.xml in /The Witcher 3/bin/config/r4game/user_config_matrix/pc

If you are on GOTY version remember to turn on the DLC in the DLC options