Installation:

1: Copy everything in the Vehicle folder to "C:\Program Files (x86)\Steam\steamapps\common\Grand Theft Auto V\x64e.rpf\levels\gta5\vehicles.rpf\"
N.B. Use OpenIV and enable Edit mode.

2: Try not to turn Los Santos into Chernobyl. Only joking!!! Destroying it won't really wipe everything out.