Okay, what you have to do is hold down the L1 button or L2 button and then go about 25% on the shot button, and then while charging hold the left joystick in the opposite direction of the spin you want to place on the ball.
I don't know about the controls of the gaming platform you play Fifa 2009 since you didn't specify any gaming platforms. But my tip would be to make sure the ball hits the edge of the goal so it'll be hard to defend.
FIFA 2009 Free Kicks
Linear Mode
