H&D2 Cheats

Hi, i saw those cheats some time ago and i couldn't use them on singleplayer everytime i tried.
Is this fake or something? or maybe i have to edit some files?
funnyhead - Big head for soldiers in unit
zombie - become a zombie after death
openalldoor - pretty self explenatory

I think those codes were for the original HD game, not HD2.
In link below they have a picture of HD2 but if you look at the date it's 1999 so 4 years before HD2.

http://www.gamespot.com/hidden-and-dangerous/cheats/

In HD2 SP you can use: (you probably know)

http://www.gamefaqs.com/pc/451072-hidden-and-dangerous-2/cheats

Thx for clearing that up for me , always thought those cheats have been
usable in HD2. Really wanted to run around with big head