Go to the credits and press ok. once credits have gone through go to exhibition match (or 'play now') and you should be able to choose Australia.
Kicking a conversion
When making a try....try trying far from the post...doing conversion look where the ball is placed and see which pole is closer to ball (alignly or parallel to the ball) move the arrow to that pole and stretch it upwards. Make sure the arrow is exactly on the post. kick make sure your power kick is high. sweet.