Need help with mods (Test Drive Unlimited)

Guys who are smart, the rutracker has an assembly Test Drive Unlimited ReincarnaTion in which a lot of cars have been added, in car dealerships you can find 218 cars + many of them have several types of tuning and by buying the same car and tuning in different ways you can get 5 or even 6 different cars and that their number is just huge, but there is a catch, some of the added cars have just an idiotic maximum speed of 400 and even 500 km / h, but they go in the game as in life, I want to make the indicators themselves in the car dealership and garage real, but added cars do not appear in TDUPE, and Modding Toolse, because of the overestimated maximum speed, its editing is blocked, who knows how to solve this problem and change the speed of the added cars to close to real life.