Champagne, don't forget that is redmarkus4's mod, not mine. He delivered a good update to the default in the game, which I like very much better. The instructions is what he informed me after I had same failed result as you, assuming Override Graphics directory was all I needed. Not sure why we need substitute the games original file, but its safe, no danger, just don't lose the original which I hope you just renamed to something you can recognize.
Yes, thanks to him for creating this very professional looking mod.
Only the dead have seen the end of War.