Download: Update X64 Dlcpacks Mpchristmas3 Dlc.rpf

It sounds like you're looking for a modding file — specifically the mpchristmas3 DLC pack for the game's x64dlcpacks folder.

For modding tutorials, search: “GTA V add-on DLC tutorial OpenIV mpchristmas3” on YouTube. update x64 dlcpacks mpchristmas3 dlc.rpf download