The term (often seen as mpsum in OpenIV's ASI manager or in modding logs) is the silent gatekeeper. When you modify dlclist.xml to include a new entry like: <Item>dlcpacks:/supercars2025/</Item> The game generates a checksum of that list. If the checksum doesn’t match what the executable expects, the game refuses to load.

A: No. OpenIV is a file explorer, not a mod browser. You must manually download from the sites listed above.

Reputable mod authors provide a checksum. Compare yours using PowerShell:

Copy that into:

This is the most common point of failure. GTA V needs to know about your new/updated DLC pack.

Whether you are restoring a clean backup or downloading a custom car pack structured around mpsum :

: If FiveM tells you this specific DLC is missing, the most reliable fix is to verify the integrity of your game files through your launcher (Steam, Epic, or Rockstar). This will automatically re-download any missing or modified files in that directory.

RPF files can theoretically be modified to execute malicious scripts or bundle hidden trojans. Downloading them from unverified Mega, MediaFire, or Google Drive links poses a massive security risk to your PC.

The update didn’t register in the game’s DLC list. Fix:

Redistributing original game files is technically a violation of copyright. Getting files through official launchers is the only legitimate method. The Safe and Official Way to Download/Restore the File

Happy modding!

Modifying assets directly inside the original mpsum/dlc.rpf via OpenIV instead of using a isolated mods folder frequently corrupts the archive structure.

Complete Guide to Downloading the update/x64/dlcpacks/mpsum/dlc.rpf File for GTA V