To work this cheat you must be Soviets. Then get an American or any allied country as your allyi. Steal your allies base by forcing an enginere into it. Then build up both bases until you can build the Cronosphere and the Iron Curtain. Build them! Then get a Siege chopper and Black Hawk - make them deploy on the ground. Pput them together and Cronosphere them as close to the enemy's base. As soon as they get there put the Iron Curtain on them and then go after there base. Have fun while you can, this only lasts a little while.