Install the files at these locations:
- dispatch.meta: update\update.rpf\common\data
- popgroups.ymt: update\update.rpf\x64\levels\gta5
- vehiclemodelsets.meta: update\update.rpf\common\data\ai

DON'T FORGET TO MAKE BACKUPS! BECAUSE I AIN'T TAKING REPONSIBILITY FOR ANY DAMAGES TO YOUR GAME!