Assuming you have the mpchristmas2017 folder, here is how to update its dlc.rpf to work with the latest game version or to merge with other mods:
[RELEASE] Fix & Guide: Adding x64/dlcpacks/mpchristmas2017 DLC (Free) update x64 dlcpacks mpchristmas2017 dlcrpf free
: This file is frequently flagged as corrupted. Users often find the folder empty or find that the game automatically deletes the file upon a failed launch attempt. Missing DLC Errors : Launchers like or the standard Rockstar Games Launcher Assuming you have the mpchristmas2017 folder, here is