Reducing the Collision Factor 'Bubble'
   
  This allows you to get closer to other aircraft before
  they crash into each other. This can be corrected in
  two different ways.
   
  1. (The easiest way) If you have MultiPlayer
      Session Utility 1.0 (MPSUtil) already installed
      all you have to do is run MPSUtil, select the CFS
      version, then in the Config settings check:
      COLLISION_SECS=0 and
      then hit the "Restore" button. This can be done for
      both CFS and CFS2.
     
   
  2. Open your COMBATFS.cfg file located in the
      CFS main folder with Note Pad. Scroll down to
      the [Multiplayer] and locate
      COLLISION_SECS=2 and change the 2 to 0.
      Save and that's it.