1. Download and un-zip both folders adn place where you see fit anywhere will do
2. Open Resorep folder and Run Resorep.jar
3. Click (Add application) and add ACIII.exe - located for me at - C:\Program Files (x86)\Steam\steamapps\common\Assassin's Creed III Remastered
4. Click the three dots (...) near the (Modded textures folder:)
5. Navigate to where you placed the Spirit remaster folder you unziped and select that folder
6. DONE! Now just run the game