The ultra_fps_boost_v23.zip file you have requested: Utilities / Ultra FPS Boost - 23.22kb is not available. Perhaps try browsing all files for the game Doom III and upload any files you want to share or are missing. This is the only information we could locate:
This tool builds custom config files based on options you enable/disable on its main screen. Those are all related to graphics settings so you may find it particularly useful if your configuration constrains you to make compromises between quality and performance.