In the context of Modern Warfare 2 (and later COD titles using the IW engine), the terms mpff and dir relate to how the game packages and streams data.
Custom weapon camos
Unlocked console developer settings
Altered killstreak values
Backwards-compatible assets for private servers (like FourDeltaOne or ReactPSN) code pre gfx mpff mw2 dir file game link
C:\Program Files (x86)\Steam\steamapps\common\Call of Duty Modern Warfare 2\zone\[language] Specific Folder : If your game is in English, the file belongs in the Forumotion.com Solid Troubleshooting Steps code pre gfx mpff mw2 dir file game link
Initialization: The code_pre_gfx files are among the first data packets the game looks for when you boot up the multiplayer engine to prepare the graphical environment. Why the Error Happens code pre gfx mpff mw2 dir file game link