Here is a save to get Rank 40 as well as a couple other cheevos. You will be rank 39 with only about 4000exp to go to get rank 40. All planes are unlocked to use. With this save you can also get Unimpressed, Test Pilot, Veteran, Versatile Pilot, Canon Ace, Evasion Ace, Wing Leader, Wing Ace Pilot, Support Ace, and Joint Strike Missile Ace. Just play a couple of Team Death Matches and you should get all these achievements. All credit goes to Tibbs for grinding this out.