To Kill Easily:
First make sure rockets are on unlimited. Get a plane that uses rockets then when your enemy is 4000 ft. away hold your number 3 (not on keypad)and hold it down and take good aim at your enemy. This also helps if you have a p-51 and use the astric.

New Aiming Sight:
This code can only be used for the p-51.
use the button next to the backspace button the slash button ( |\).this will give you an astric aiming sight