Add-on :

with open iv drop corolla94 folder in :

mods/updates/x64/dlcpacks 

then go in :

mods/updates/updates.rpf/common/data

find dlclist.xml , right click, edit and add this line : 

		<Item>dlcpacks:/corolla94/</Item>

Replace :

with open iv drop all content of "Replace" folder in :

mods/updates/updates.rpf/x64/dlcpacks/patchday28ng/dlc.rpf/x64/levels/gta5/vehicles.rpf

*if you don't have a patchday just copy it from base game 

Add car in traffic :

Tutorial 
https://www.youtube.com/watch?v=R5i6qZ3XT5g

or use 
https://www.gta5-mods.com/scripts/dlc-vehicles-spawn-on-traffic

for extra config in order to work with vehfuncs V install vehfuncsv folder in your
game directory 

https://www.gta5-mods.com/scripts/vehfuncs-v

that all, thanks for downloading! 