"Main Game" Folder

1 - Drag and drop the handling.meta >>> mods > update > update.rpf > common > data
2 - Drag and drop the vehicles.meta >>> mods > update > update.rpf > common > data > levels > gta5

"RDE modpack" Folder

3 - Replace the carvariations.meta, handling.meta and vehicles.meta at this location >>> mods > update > update.rpf > x64 > dlcpacks > rde > dlc.rpf
4 - Replace the global.gtx2 at this location >>> mods > update > update.rpf > x64 > dlcpacks > rde > dlc.rpf > x64 > data > lang > [YOURLANGUAGE].rpf