Aces of the Great War

To keep your pilots alive forever, make a copy of the
PILOTS.DAT file before going on a dangerous mission.
If you get killed, you can copy the file back and you
pilot is resurrected as though he had nver flown the
fatal mission.
For example, to copy the file, change to the Aces
directory and type:
COPY PILOTS.DAT BACKUP.XXX
To resurrect the pilot, change to the Aces directory and
then type:
COPY BACKUP.XXX PILOTS.DAT
Make sure you copy the PILOTS.DAT file every time you
successfully complete a mission.