You will need the things below if you have addon cars or the game simply won't load
https://www.gta5-mods.com/tools/heapadjuster
https://www.gta5-mods.com/tools/packfile-limit-adjuster
https://www.gta5-mods.com/tools/cweaponinfoblob-limit-adjuster
https://www.lcpdfr.com/downloads/gta5mods/misc/24718-gameconfigxml-for-lml-or-manual-install-by-rde-team/
It shall be noted there are multiple versions of these out there. These are just some that I found quickly, I can not guarantee these will work but they should. I do recommend finding some that suits your needs specifically.