NFS4LFE, I use manual transmission for everything, but it just so natural for me that it might as well be automatic. You should use whatever you feel most comfortable with. You are supposed to be having fun.

Would you reccomend using stick shift for all the missions?

i am a fan of gt4 and i have vids for it
please see my channel :)

I don't think I answered your question about car setup and I'm sorry, but you'd be better off going here to get that information. They have everything you need to know about setups for tracks and cars:
http://www.gtplanet.net/forum/forumdisplay.php?f=55

Just correcting you: it's "Percarolo"

oOoironhideoOo, any Pescalaro, Audi R8, Minolta Toyota, Toyota GT1, Bentley, etc. LMP Race Car can easily win an under 50 point race. If you can afford them then use any of them to win. If you have an F1 car, use that to make it super easy. Take your time. The key is not to run into walls and waste time especially at HongKong. Spare those tires.

oOoironhideoOo, the cheapest and easiest car to win with is the Mazda 787B. It's light and is very easy on tires. Use racing mediums in the front and hards in the back for all races except Opera and HongKong. For those use soft in the front and medium in the back. Soften the stock suspension up a bit and add more ride height for all races. Add the stage four turbo. Gear the top speed for 230 at Sarthe. Take it easy and stay on the course. That's all. I just used the old Black 787B and won the races easily after I did some practice. You can do it.

Look .. i have a problem and i need help ..
and i think you may can help me .. :)
i am on the 68% of the game and i'm racing the gran turismo championship .. in the proffesional events .. but i cant complete it ... can you tell me ho car is the indicated for this competition and what specs i must put in the car plz ? (i mean brakes 5 - 9 , spring rate 19.1 .. etc)
I will really aprecciate this . . . !

¿my friend?

do you know where I can get episode 1-100 of Pure 19? sorry to bother