: seta r_picmip "0" (0 is the highest quality; higher numbers like 3 reduce texture detail to boost FPS).

A: Yes, but those clients already have enhanced configuration menus. Use their native settings instead.

A config.cfg means:

Configuration files are bound to the specific hardware profile of the creator. Using a file configured for a high-end system on a mid-range PC can cause game crashes, screen tearing, and severe stuttering. Locating Your MW2 Configuration File