Advise a modification or how to build a mod for Call of Pripyat (STALKER: Call of Pripyat)

Tell me the mod a simulator of life in the zone that disables the plot. Or minor modifications. I'll try to assemble it myself.
Loading the store, adding quests to clean up mutant logs ..., frequent spawn of artifacts after being thrown, adding food and weapons ...,
in a word, all modifications
that will bring the game closer to an interesting free-play. Thanks in
advance to
everyone who responds.