Installation:

1: Download and install the relevant car mods

2: Add the liveries to the .wtd files of the modded cars using OpenIV or SparkIV

3: Ensure the modded cars all have +livery at the end of their vehicles.ide parameter

4: HOLD ON TIGHT!!!!!!!

1969 Dodge Charger R/T - Colossus
http://www.gta4-mods.com/vehicles/1969-dodge-charger-rt-f7209 

Ford Mustang Boss 302 - Saw
http://www.gta4-mods.com/vehicles/2013-ford-mustang-boss-302-f16316 

Ferrari FF - The Swarm
http://www.gta4-mods.com/vehicles/2012-ferrari-ff-f12375

Lamborghini Huracan - Nemesis Inferno
http://www.gta4-mods.com/vehicles/lamborghini-huracan15-f30266

Bugatti Veyron Super Sport - Stealth
http://www.gta4-mods.com/vehicles/2011-bugatti-veyron-164-super-sport-epm-f17011 

Declasse Scramjet:
https://www.gtainside.de/en/gta4/cars/152387-declasse-scramjet-hq-interior/ 