I bought Rome: Total War at YesAsia when it first came out. On the box it said 'Made in Australia'. Alas, YesAsia does not carry Barbarian Invasion so I need to buy it from a dealer here in Korea. The version sold here in Korea is a direct import and I am quite certain it is from North America. Will there be any problems if I install North American Barbarian Invasion over the Australian original game?