The IVPack modification, for Grand Theft Auto V introduces a range of vehicles, from GTA IV to the updated version of the game. Players can now enjoy driving cars, motorcycles, boats and helicopters that were featured in the GTA installment but were missing from GTA V. 
The vehicles, in GTA V keep the look and design as they did in GTA IV. Have been adjusted to work seamlessly in the gameplay of GTA V. They work well in the game and come with cool features, like lights and realistic damage effects that players can interact with. 

Installation:
For OpenIV modPackage:
1. Install ASILoader with Scripthook
2. Install OpenIV
3. In OpenIV go to Tools -> ASI Manager and install ASI Loader and OpenIV.asi
4. In OpenIV, click Tools -> Package Installer and choose IVPack.oiv
5. Choose Install to mods folder.

Spawn names:
admiral, angel, blade2, bobcat, bodhi, boxville6, brickade2, buccaneer3, bus2, cabby, chavos, chavos2, cheetah3, contender2, coquette4, df8, diabolus, double2, emperor5, esperanto, feltzer, feroci, feroci2, flatbed2, floater, fortune, freeway, futo2, fxt, ghawar, hakuchou3, hakumai, hellfury, huntley2, interceptor, jb7002, lokus, lycan, lycan2, marbelle, merit, mrtasty, nightblade2, noose, nrg900, nstockade, packer2, perennial, perennial2, phoenix2, pinnacle,pmp600, police6, police7, police8, polpatriot, premier2, pres, pres2, pstockade, rancher, rebla, reefer, regina2, regina3, revenant, rom, sabre, sabre2, schafter, schaftergtr, sentinel5, smuggler, solair, sovereign2, stanier2, steed, stratum2, stretch2, stretch3, sultan2, superd2, supergt, taxi2, taxi3, tourmav, turismo, typhoon, uranus, vigero3, vincent, violator, voodoo3, wayfarer, willard, wolfsbane2, yankee, yankee2

Credits:
_CP_, Vanillaworks Team and other modders