regularNPC

You can go to the same pathway you had the cars and copy+paste them into the mods folder, or you can simply delete your new modded files and the files outside the mods folder will work just fine, you just cannot modify those files.
 
Usually, the result of your images is the result of models and/or texture files conflicting and not belonging to the model. Green/Black&White Checkers typically indicate missing textures.