Civilization V Vanilla main music.

[Sharples]

Hi, I have all the expansions in Civ V. I don't like the Civ V BNW/G&K music. How can I change this to the vanilla main music without affecting game-play, expansions, ect?

I also want to keep it like this permanently, so when it starts up I can hear the vanilla main menu rather than the brave new world one.