DNKROZ or DNCORNHOLIO = God mode on/off
DNSTUFF = All items
DNITEMS = Just items, and I think keys too
DNSCOTTYE*L* = Replace the * with the episode and level you
want to warp to!
DNRATE = Kinda useless, displays the frame rate in the upper left corner
SWCHAN=God mode on/off
SWGREED=All weapons items and god mode on
that's all the shadow warrior codes I can remember.
Links to game sites to help you out.
Ozone games has codes galore!
Gamezone has lots of game related info
FF7 game info
Game Mansion has lots o' games
Free Ware, plenty of programs and other stuff.