Taken from Overlord of the Zone ver. 0.5
S.T.A.L.K.E.R .: Call of Pripyat: Cheat (HUD DISABLE MOD) Free Download
This is a mini cheat that gives GG immortality, endless running and endless carry weight.
How to use. To enable the cheat, during the game, go to the menu and press F1. The entire interface is removed and immortality, endless run and endless carry weight are turned on. To turn off the cheat, during the game, exit the menu and press F2. Returns the entire interface and turns off immortality, endless running and endless carry weight.
HAVE A PLEASANT GAME =).