@Reacon I've tried both, but mostly entering the models's name on the spawner.
I've used the spawner of the simple native trainer and ImNotMentaL's Benny's Garage mod.
I've also just drive around Vinewood (as there is where these cars usually spawn), and the npcs are also driving the vanilla car

@Reacon As far as I know, it is. All the files that I've copied there are there, and other mods do appear in-game. I also have both .asi plugins installed

@Reacon Sorry to bother again, I put the files on patchday20ng folder, which was the more recent I had but vanilla cars spawned once again, is there something else I can try?

@Reacon Got it, I'll try that. Thanks, really appreciate the help

@Reacon So instead of putting them into the patchday folder that the readme's said, I have to put them in the most recent patchday even if the car is not located in there?
I am installing them as replace

@Reacon
-SCAT's Ferrari F430 Scuderia
https://es.gta5-mods.com/vehicles/ferrari-430-scuderia-add-on-replace-tuning-template#comments_tab
-Sco Savage & Jridah's Rolls-Royce Phantom
https://es.gta5-mods.com/vehicles/rolls-royce-phantom-2012
-Alex9581's Bugatti Veyron
https://es.gta5-mods.com/vehicles/bugatti-veyron-2009-add-on-replace-auto-spoiler-animated

I'm a new member and couldn't reply sooner, sorry about that

I've been trying to install a couple car mods in my game for the last two days and can't get them to spawn in game, despite the fact that the modded model do appear in OpenIV. I have installed them in the vehicles package and in the respective patchday folder yet the vanilla cars keep spawning instead. I think it is not my mistake as I have installed a couple other cars and they do appear in game