BIB_M2X_replacement.cfg - Replaces the stock textures of Mk2Expansion parts with the black ones, instead of adding new copies of the parts with the black textures. Use this to reduce part clutter if you don't want the white parts at all.

BIB_Stock_blackdefault.cfg - Sets the black textures to be the default setting.

To use, put the desired patch into the BackInBlack folder inside GameData