This works
 

Goto folder Cryostasis open config.cfg then make it below like this:

//=================== game settings ======================
@auto_weapon_switch = 1
@D.consoleh = 1


save the file and set the file attribute to read only (this is important)

Then the godmode = 1 and all named cheats work fine ;)

Sorry for your efforts, but it still doesn't work.
yes, I've modified the file and set the atribute to "read only".

console shows up only in main menu, never ingame, regardless of the modified files :((.