If mp.ff is a file-container ('.ff' sometimes used for 'file format' archives in games or engines), it might bundle shaders, textures, and small binaries. 'pre gfx' suggests assets that have been preprocessed—mipmaps generated, textures compressed, shaders compiled—to reduce runtime load. 'code pre' could refer to precompiled code modules or initialization scripts that must run before graphics subsystems start.