!!!BACKUP FIRST!!! 

----------Installazione---------- 
Usando OpenIV sostituite il file situato nella directory 

F:\Program Files (x86)\Steam\SteamApps\common\Grand Theft Auto V\update\x64\dlcpacks\mpchristmas2\dlc.rpf\x64\levels\gta5\vehicles\xmas2vehicles.rpf\

----------Installation---------- 
Using OpenIV replace the file located in the directory 

F:\Program Files (x86)\Steam\SteamApps\common\Grand Theft Auto V\update\x64\dlcpacks\mpchristmas2\dlc.rpf\x64\levels\gta5\vehicles\xmas2vehicles.rpf\