For cheats in this game, use the DOS utility DEBUG. First
backup your game to be edited, then type the following from
the dos prompt:
ren e:\fire.exe cheater.cht
debug e:\cheater.cht
For invulnerability, type: e 30cb eb 8
For infinate magic, type: e 201a 90 90 90 90 90 90
w
q
Then rename CHEATER.CHT back to its previous name.