--// Things you need //--
You need OpenIV

--// How to install //--
Go to "Grand Theft Auto IV\GTAIV\pc\models\cdimages" with OpenIV
and open vehicles.img
search for lokus.wtd
select it and delete it
then go to LokusFix and select lokus.wtd
and then drag it to "Grand Theft Auto IV\GTAIV\pc\models\cdimages"
and now select it with OpenIV and drag it into vehicles.img