1. Navigate to wherever you have Sifu installed and go to it's Paks folder
Example: D:\SIFU\Sifu\Content\Paks
2. If it doesn't exist, make a new folder called ~mods - Should look like this: D:\SIFU\Sifu\Content\Paks\~mods
3. Drop the mod's pak and sig files (pakchunk0-DodylectableModificationsBlueMary(P8)_99_P) in there
4. Boot up the game and have fun!

NOTE: The color variation (P8) pak files REQUIRE the main pak file to be installed, it's not standalone