How do you curve a free kick in fifa 09

There is a lot of science behind this answer. You must kick the ball so that it spins around in the air. the lower pressure on one side sill cause it to move in that direction. another way is to wait for some wind and let the wind carry it.
Actually you control it. Hold down RB/R1 (this is how you get a lot of bend) point forward on the left stick prior to shooting, press and hold b for the desired power, and after the shot meter stops slide the left stick 45 degrees to the left or right depending on where you want it to curve. The physics system in this game is pretty realistic but its still a video game and you still use the controller to do cool shii'te