Invulnerability and Infinite Ammo:
Once you install the game go into the directory
of which you installed it using Windows Explorer, and find the
document called ca.ini. Scroll down until you find the
word Cheats in brackets. Find "InfiniteAmmo", and put 100 in
place of the 0. Do this to Invulnerability. Start the game and
when you play you will have Invulnerability and Infinite Ammo.