Yeager.com patches the game so you won't require the aircraft
information to start. Simply type YEAGER <enter> and away you go...

In order to change the intialisation of the game (instructions in
Yeager.txt) you will need to move Yeager.com out of the game's
directory/folder (or simply delete it), type YEAGER NOSOUND <enter>
(or whatever you choose), exit the game and then move Yeager.com back
(or copy it over from the CRACK subdirectory).