I figured out that I had to get OpenIV.
Did that, but it wants to crash whenever I put vehicle models in the directory.
Not asking for help. Giving up. Don't have time to figure it out.
I'm trying to install the vehicles. I don't have a "mods" folder. So i created the mods>update>update.rpf>common>data>levels>gta5 path myself. Didn't work.
Then I tried to put them in update>update.rpf>common>data>levels>gta5 except "update.rpf" is not a folder and I can't open it.
Not sure what to do.