Jimbo2142

Hey guys, I want to replace the new vanilla Gauntlet Police car with some cooler looking modded cars from this site's webdisk. I tried to install some yft and ytd files from some car mods, which were orginally developed to replace the police2 car. Just giving the files the new name "polgauntlet" brought the modded cars into the game and replaced the gauntlet, but the texture was all black and the driving physics were very bad. Did I missed something? What to do to fix it? Thanks!