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.