I hate to bump the post, but wanted to say THANK YOU to the original creator of this mod. I started using this about 1-2 years ago and have edited well over 500 handling files with it. Fiddling around I figured out what everything means, so now it's really easy to know what to change to get the right body roll, suspension height, pitch (back raised etc), turn radius, corning and accel grip, torque and power, gears, drag coef, height of veh, you name it. When you get the hang of this program, it is -such- a powerful tool. Only thing I wish, is that changes were realtime but hey I know that's not possible. If you haven't got this program working, trust me it works and is awesome. I used it in GTAIV and also for EFLC and TBOGT. I would have never got so far into modding all my cars if it wasn't for this program, now it's like an addiction because I want every car I add to be perfect. My trick, I go in IV, load handling editor, drive X car, what changes do I want to make>>tab out and go to that car in handling program, make changes>>go to next car>>same process. Reload IV, jump back in those cars, were the changes enough if not make changes, if so move onto next car etc. I'll knockout about 20-30 cars at a time (if I added that many) and then do above process, then reload IV, re-test, make changes etc. Can get alot of cars changed quickly this way.