Use OpenIV to install the following files (taxi.ytf, taxi_hi.ytf, taxi_ytd) if you do not know how to use openIV i would recommend looking for a tutorial.
What's New in Version 1.0.1
Hands on steering wheel is fixed.
Taxi lights are fixed however, they still don't turn on during a mission they only work with a trainer.
Livery support as been added with new skins
Added coffee cup on the dashboard randomly spawns.
Rockstar games for taxi parts.
Skin put together by codex12 and taxi modifications.
Newspaper from (3D warehouse).
SpeedySC1978 for the vehicle skins & livery support.