Add-on Car Auto-Spawner or Natural Spawner
An Add-on Vehicle Auto-Spawner or Natural Spawner that makes all DLC Add-on Cars/Vehicles to spawn automatically or naturally as they were a part of the game so that you don't have to use a Trainer or Add-on Car Spawner every time when you wanna ride you favourite car.
@Gr8VKS look up San Andreas Exotic Traffic mod. It isn't a script, but a modified game file that you install with Open IV.
@Gr8VKS Yeah, several mods do this, including Realism, Realism Dispatch Enhanced, and World of Variety.