1

How do I make all of my car files into 1 file without breaking anything?

2

Try using this merger. You can do the same manually, there’s a guide somewhere on the forum but I can’t seem to find it.

3

This is going to go into your fxmanifest (FiveM-Civ-Car-Pack/fxmanifest.lua at master · PLOKMJNB/FiveM-Civ-Car-Pack · GitHub)
You just need the code from line 1 to 23

Make a data and stream folder, in data make a folder of the name of the car, put all the Metas in there, then in stream put all the of your streamable files in there