For infinite 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 main.dat cheater.cht
 debug
 a 100
 mov dx,es
 add dx,1000
 mov es,dx <PRESS ENTER TWICE>
 
 g 108
 r ip 100
 ncheater.cht
 l
 e es:11aa 0
 e es:11d1 0
 Then type: w
 q
 
 Then rename CHEATER.CHT back to its previous name.