1. Please create a backup of the original game .zip files!!
2. open the game folder (C:\Program Files (x86)\Steam\steamapps\common\BeamNG.drive\content\vehicles\vehiclename.zip\vehicles)
3. also open the AllVehicles_Fixed.zip, open "vehicles" folder, choose the car folder (pigeon folder for example)
4. inside the pigeon folder, you will find the .jbeam file, copy all of that, drag/paste the file into the (pigeon.zip\vehicles)
5. same process with all other vehicle
6. enjoy!