Installation
1. Launch OpenIV (go to http://openiv.com/ if you don't already have it)
2. Click "Edit Mode" in the top right so you can edit the files.
3. Copy All the .ytd files and paste them into  GTA V/ x64e / levels / gta5 / vehicles
4. Turn off edit mode by clicking on the icon for a second time.
5. Exit OpenIV
6. ENJOY!

