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
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.