To keep your pilots alive forever, make a copy of the 
ROSTER.DAT file before going on a dangerous mission. If 
you get killed, you can copy the file back and your pilot 
is resurrected - as though he had never flown the fatal 
mission. For example, to copy the file, change to the 
Aces directory and type: COPY ROSTER.DAT BACKUP.XXX To 
resurrect a pilot, change to the Aces directory and then 
type: COPY BACKUP.XXX ROSTER.DAT Make sure you copy the 
ROSTER.DAT file every time you successfully complete a 
mission.