All you gotta do is place the things in the thing! It's that easy.
C:\Program Files (x86)\Steam\steamapps\common\Age of Civilizations II\map\Earth
go to there and move the update and config foldier there
you might need to update the province data (Growth rate, contintent, region, province background etc...) but it is new provinces. (the provinces have been split away from Rome (Split in 3 so 2 new), Mostar, Belgrade, Novi Sad, Liege (Split into 4, so 3 new), Rimini,(Split in 3, so 2 new) and Tyrol)
R.I.P. brain-cells everyone who read this