#1 click on "Open .car"


#2 select the EditCar.car from program folder(eg. C:/users/myprofile/Desktop/)


#3 on the top-right side of the window there are 4 buttons, press on WR2


#4 press the button on the side of "WR2.ds path:" and open the file WR2.ds from the folder FrontEnd of your game(eg. C:/program files (x86)/World Racing 2/FronEnd/)



#5 slect one of the cars from the right list loaded from the WR2.ds file and press Import, so edit the data(engine power, number of gears, wheel size or whatever you want to do)


#6 when you're done, press on "Save .car" and save the file as "EditCar.car" in the folder of your addon car

check the readme for more infos