So I downloaded this BMW M3 GTR Mod. And well first thing, it replaces a car called sentinal something. Second, How do I change the top speed and acceleration of the car? Third, I need to remove that car, like disabling it from spawning in traffic, so only I have it.

My suggestion is: Somebody should create a mod where you can edit the performance for cars, if that's not possible, I don't really know then, leave it. but there should be a way to change top speed and acceleration using openiv and stuff. BTW I do not need help installing it, I already can install it myself.