For infinate lives in this game, use the DOS utility DEBUG.
 First backup the game to be edited, then type the following
 from the dos prompt:

 ren e:\main.dat cheater.cht
 debug
 a 100
 mov dx,es add dx,1000 mov es,dx     <PRESS ENTER TWICE>
 g 108
 r ip 100
 ne:\cheater.cht
 l
 e es:11aa 0
 e es:11d1 0
 w
 q

 Then rename CHEATER.CHT back to its previous name.