For infinite lives, use the DOS utility DEBUG. First backup your game to be
edited, then type the following from the DOS prompt:
(This Cheat is for the CGA version of the game only!)

ren traz.exe cheater.cht
debug
a 100
mov dx,es
add dx,1000
mov es,dx 
g 108
r ip 100
ncheater.cht
l
e es:6b2f 90 90 90 90 90 90
Then type: w
q

Then rename CHEATER.CHT back to its previous name.