FS2004 Utility V6. 6. 7 Addit! Pro. For Flight Simulator 2004 Addit! Pro is a comprehensive addon manager for Flight Simulator 2004. Easily install, manage and remove aircraft, adventures, flights, flight plans, panels, A. I. flight plans, A. I. airport and facilities data, scenery, sounds, textures, videos, weather and more! Archive addons to Addit! Pros File Cabinet or recreate them in zip files. Modify your aircraft, panels and sounds. Automatically update FSs Scenery Library. Includes A. I. traffic manager, complete scenery library editor and more! See Readme. htm for details. Requires Flight Simulator 2004. A Century of Flight. By Joseph Stearns. joseph. stearnsatbyteforge. com.