It sounds like you want to assemble a text instruction or command related to updating a specific DLC pack for a game (likely Grand Theft Auto V, given the x64/dlcpacks/ structure and .rpf file).

Update the x64/dlcpacks/mpg9ec/dlc.rpf file with the latest version. Or if you need it as a command (for a modding or file replacement context):

Copy / replace "dlc.rpf" into "update/x64/dlcpacks/mpg9ec/"

Here’s a clear, single-line text you can use: