Thanks guys :) Gonna work on the thread now.
EDIT 1: About the Jag, I've got to set the materials to the car. From Zoqqer's video, it's not very easy to understand because he speed it up and it's hard to keep up. Anyway, what I've learn so far:
Select a 3D Model form Forza> Import it to Forza Studio> Extract Exterior, Interior, brakes and low-poly shadow model and be careful to untick to race parts from forza (Spoiler, Spliter, rollcage...) > Get to ZModeler, set paths for new files > Import an original TDU Model to ZModeler (In my side it's the original Jag E-Tye Atari Model), and delete almost everything but we must keep the main materials for our Forza Model > Import our Forza Model and set every parts a definite material (Windscreen as Glass, Front Bumper as Aluminium or Carbon Fiber...).
That's what I know at the moment :)
EDIT 2: I'm wondering one thing about sound mods. Noob question but could be a good one :D How from an engine who's reving up we can create stable sample who stays at the same RPM ? I mean, when you get sample from youtube, you can't get 3 sec of the car accelerating and put it in the game just like that, it's gonna be a weird repetitive loop. How can we transform a rev up sample to a "flat" sample ? I'm saying that about what I've read in the great document by Djey and 2CVSUPERGT (Yes I'm French :cheeky:)