Snowplow (SP) is your friend. Press the button on the tgp screen, press it again...then move the cursor in any direction and the square box should pop up on the hud. Remember to be flying straight and level when you press the cursor slew switch for box to be as straight as possible. If ur banking or pitching...it wont slew directly in front.
Try it and report back if it works. Remember you need to press SP twice. First time it will highlight in white and second will remove the white highlight. Then ur good to press the cursor slew switch
