I have see your mod a few times i did not tested yet. But i will.
The problem i encounter with gtr2 and also many newer race sims is.
The way the game is build.
(Mean the way simbim made there folder structure)
Example.. all cars are the same in a single class. Meaning if you select a race with 10 ai's lets say ferrari f 550's only all the cars are the same only the livery is different.
Thats because the mod makers but also game makers do this because its easy.
All the 10 ferrari's use the same sp file, engine file, hdc file same setup file etc
And this is where the problem is at..
In real life cars even between team mates arent the same. And setup arent completly the same, Every driver have his own tweaks.
But gtr2 dont let you give every single car his own setup. Because the way the folder structure is and how the game reads and searches for the files.
The setup needs to be in the main car folder (where the eng file hdc etc is located)
So if you make 10 copies of the ferrari f550 team folder and give them a name like ferrari f550 teams - 1, ferrari f550 teams - 2 etc. I allways name them with - xx , xx the number of the car linked to the livery
And delete in every other liveries that arent linked with the car number.
So you end up. With 10 stand alone cars
In stead of 1 f550 with 10 skins.
Then you can give every car there own setup file there own engine file. Gearbox.. sp. Etc. So you can tweak every car instead of the 1 setup for all the ferrari f550 cars.a
Example
So you can give ferrari f550 car number 1
High downforce, softer springs, hard tyres
And give the ferrari car number 2 medium tyres, softer springs, lower downforce.