In Euro Truck Simulator 2 modifications are easy to mount. Just download mod from here, copy / unzip files to the folder “My Documents\Euro Truck Simulator 2\mod” or, if you are playing ATS, add mods to the folder “My Documents\American Truck Simulator\mod” You can use: WinRAR or 7zip to unzip the files. You need to turn on the mods you want to use after that.