I don't know if the guy personally changed the cheat codes. But normally it would be:
parameter add goobers (or download the "start" bat from dome news...google dome news)
then backspace + alt+ shift. tab+g makes god mode. tab +i points, lives, hp, weapon, ammo (no keys)
normally with out the parameters, (or with) you can press ilm for no score, all keys, all weapon + ammo, 100% hp.
It all works assuming the guy didn't change the cheat codes. If he did, we are a bit stuck, if you know what I mean.