I'm having trouble in mission four. I can't shoot down planes fast enough before the time limit expires. Plus, I need help with destroying the bombers, I keep getting shot!

u again!? ok you should destroy the 1st wave of Ju88B sooting from bellow then a 109 will attack you but u can kill him really easy then u should go for the Stukas becuse they cant hold too much fire, oh! and be sure that u send ur wingman to attack an use the SP hability of cowboy as many times as u can. after that the paratroops ar pretty easy.