To score a try from a scrum is easy, although you need to be quite close to the oppositions' try-line respectively within the 22 metre line. Firstly feed the ball into the scrum like you would in a normal scrum. Then drive using the Circle button. Keep driving but do not hook the ball as this will turn it into free-play. When you get to the oppositions' try-line immediately press X to dive on the ball. You have now scored an easy try.