Help, how to remove the Invisible Aura from Nepis? (STALKER: Clear Sky)

Help guys .. Wherever I was looking, but I never found the information, I tried to remove the damn "invisible aura" from the NPC himself, enrages when you try to approach the NPC in a dense one, you are stupidly stopped by an unprecedented force. In some modifications, there is such a function, but I am a person of the old school and I do not like it when there is a lot of unnecessary things in the game. From new arts to bfg. I myself tried to find in the files of the game where you can remove this radius from the NPC. In general, I will be glad to infe, where in which file you need to climb in order to remove only this radius, where to register, etc. thanks in advance.