Flight Simulator 98

Flight Simulator 98 cheat codes: 
To  increase your altitude BEFORE you've taken off,
press Y then F4. When you  want  to stop going up, press Y again.
Anytime during the game press "y". You will stop and so will
everything. On the top it will say "slew" Then press either  F2  to
go  forward  o  r back and F1 to stop. Or press F4 to go up or downand
F3  to  stop.  Also  when  you  are in "slew" mode you can the can
go forward,  back,  right  left  using  the  arrow  keys  on  the
keyboard or the joystick. When you are done press "y" again.