Extra wheel installation instructions:

- Open gta3.img.  (gtasa/models)
- Find wheel_gn3.dff and extract it (backup) and then delete it
- Add wheel_gn3.dff and ywheel.txd
  (the ones that came in the zip)
- Rebuild archive and after that close IMG Tool.
- Open veh_mods.ide (gtasa/data/maps/veh_mods)
- Find this line:
  1096, wheel_gn3, vehicle, 100, 2097152
- Replace the word vehicle with ywheel so that
  the new line looks like this:
  1096, wheel_gn3, ywheel, 100, 2097152

Done!!  :)