Monster Truck 1.0 

This mod replaces Rancher with Monster Truck.

Install:

REMEMBER TO BACKUP ORIGINAL FILES!

You need latest SparkIV or OpenIV and File Check Disabler.

1. Copy Vehicle.ide and Handling.dat files to C:\Program Files\Rockstar Games\Grand Theft Auto IV\common\data and replace original files.

2. Run SparkIV or OpenIV and open file C:\Program Files\Rockstar Games\Grand Theft Auto IV\pc\models\cdimages\vehicles.img and replace original rancher.wft with my modified rancher.wft and save your vehicles.img file.

3. Close SparkIV or OpenIV and start your GTA IV and enjoy!