Carskins are community-made alternate paintjobs for Re-Volt cars. Some of the skins are made for the Re-Volt stock cars (like RC Bandit, Toyeca,…). But there is also a huge amount of alternative skins made for custom made Re-Volt cars. The skins (BMP-files) must be copied into the folder of the base car. Then you can switch to the skin at the car selection screen with the left and right arrows. At online-races your choosen skin is only visible for your opponents, if they also have the skin installed.