https://www.gta5-mods.com/vehicles/mcdonnell-douglas-dc-10-30-add-on
don't ask, this is the one that needed me to edit extratitleupdatedata
edit:
bruh

used the exact same instructions as before; put the addon in the folder, edit dlclist.xml to load it, and edit extratitleupdatedata.meta for some reason. extratitleupdatedata.meta was only in the instructions for one mod, and it still doesn't work.

Got a few scripts, they worked.
Got the OpenIV ASI loader, and some mods
Put said mods in their respective folders and RPFs, edited dlclist.xml as required and launched the game.
I have used these mods before, and now they aren't working. Fresh GTA install, even on a fresh OS.
If there's anything i forgot just tell me but right now idfk what i'm doing wrong