Intstructions - Copy and past mpchristmas2017 into your dlc.rpf folder if you do not already have in your mods folder.
Follow the path below. Drag and drop the new Raiden files. 
Path - Grand Theft Auto V\mods\update\x64\dlcpacks\mpchristmas2017\dlc.rpf\x64\levels\gta5\vehicles\mpchristmas2017.rpf