Known bugs: Sometimes the player and radar disappear entirely. To fix this bug, reinstall your game. This is why you should always have a backup of GTA IV because it only takes 5 minutes to get a new fresh installed IV back. Once you have reinstalled your game just follow my instructions again. If you have any questions be free to contact me, as I will answer all. 🙂
Installation:
Open OpenIV or SparkIV. (Your choice)
Open GTA IV up in the program.
Navigate to “pc” then “models” then “cdimages” and lastly “vehicles.img”
Scroll down until you find “police2.wtd”
Open “police2.wtd” and drag “police_livery.png” onto it.
Press “Ok”
Press “Save” and back out to the previous screen.
Scroll down until you find “vehshare.wtd” and open it up.
Do the same here as you did with the previous one, except you do it with “vehicle_generic_police_livery.png” now.
When you are done close OpenIV and take a nice look at your new NYPD cop cars.
Credits:
mrtookyourgirl69