If a car has a tendency to slip and slide on turns, how could I fix it in a handling line?

Like the vehicle flipping? open the handling.dat and highlight the line of your choosing, then copy and paste one of Sgt.Kanyo's custom handling lines just an FYI i use his 03 CVPI handling line for every vehicle i use, even truck's, the best i've seen thus far, probably the best out there.

I mean for doing it myself. In this particular case, it's a Stinger replacement, so should be very fast but have stable steering.

Might I tempt you with these links,cp:

http://www.gtamodding.com/index.php?title=Handling.dat

http://www.gtagaming.com/downloads/gta-iv/tools/1825

They'd help you do your own handlings.Hope it helped.

You mean the car tends to oversteer in corners a lot? If you move the center of mass a little bit to the rear, for example -0.05, that should help you be able to recover more easily, and also you can add more grip to the tyres.

1777.0 0.33 85 0.0 0.0 -0.25 0.0 4 0.128 1.0 260 0.52 0.67 0.7 33.0 1.45 0.95 14.0 0.11 0.47 2.5 1.7 1.7 0.1 -0.08 0.0 0.49 2.0 1.0 2.2 2.5 0.0 25000 400010 0 0

Red number stands for the center of mass' y coordinates, green number stands for cornering performance (higher the number, the faster the car will corner), blue number stands for tyre grip (the higher the number, the less likely will the car get out of the control, and also it'll be easier to recover)