Guys i've tried the first part of this mission like 20 or 30 times, and i think its almost impossible to actually make it through the canyon, better yet make it in the time specified. help me out here please

Yup super hard, use the FWA or whatever its called, its the fastest plane there, and with awesome weapons. Nearly always use full speed, brake hard for corners, if your close to Joe or whoever it is with you... i forget use the A button to lock on and do tighter turns (im not sure if you can do it... i forget that too hehe).

But if your haveing super trouble, go into the arcade mode and find a plane when you upgrade it from completing the arcade mode that gets boosts on speed and acc. If ya don't get me read the instruction manual. Just keep trying; okie dokie?

It's super hard don't worry, took me a few times.

well i think I've tried this mission another 20 or 30 times, and still i cant get through it, its amazing I'm stuck, but the good part is a discovered two cheats (god mode, decrease damage) they should be posted soon.

I think I'm giving up this mission is gonna make me stop playing.

No don't stop theres still some awesome missions, if ya crashing well then ya wiggeling ya nunchuck too much, and if your not fast enough then its obvious ya gotta pick the fastest plane and just hold fowards all the time.... well nearly all the time; ya get me....

so i managed to pass what a i consider 2 sections of the valley, you know where you get a half wall/mountain, not sure if i'm describing it right, but i can pass the second wall with 1 minute and 45 second but i eventually hit something:#

Well if you can;t get passed that first bit... this is gunna piss you off. Theres two more of them to go through.... and you start to get planes to shoot down while trying to avoid the ice..... have fun!!!

(i basically can't help you anymore)

OK i have a cheat for you on the screen where you chose options carriere or arcade you hold (+ and -) for this to work you cant hit the b button OK. so put on the ground and do what i said earlier hit left right 1221. you should get all planes missions and paints including air Marshal. hope i helped

what is at the end once you get through?

Yup this is one of the hardest missions ive ever had. makes me want to throw the controllers, worth giving up before that happens though from what ive heard. Rest of the game is So simply and then they throw this crap in here. Riddiculous

simply put, jam the joystick forward and only brake when absolutely necessary

does the cheat where you unlock everything, disable your saving?

You'll get it eventually; I've been able to get through the first segment with a good 30 seconds to spare with upgraded planes (I think I used the upgraded twin mustang). Just remember to brake on the turns and fly fast during the straight sections.