From what I know, call-of-pripyat-complete introduces more problems than it solves. It also uses really old versions of the graphical enhancement mods. You are better off installing either just Atmosfear and Absolute Nature, or install Arsenal Overhaul 3.1 which includes those graphical mods in specially adapted versions in the "optional addons" folder.

CoP doesn't really need bugfixes, it's not broken like the other two games.
I don't actually know of any dedicated bugfix mods for CoP.
But I recon since you are likely a native speaker of Russian, you can check some Russian language forums, there are a some mods that were never translated into English.

Thx, as i understand Atmosfear and Absolute Nature is one mod?

http://www.moddb.com/mods/atmosfear-for-call-of-pripyat/downloads
Sorry, AN4 is and add-on for atmosfear... My god, why cant it be a single pack :)

Thx again for these patches. Game looks really nice after them. Though i don't undestand how anmosfear + nature mode changed my interface...

I've got question, take a look at my load:

https://pp.userapi.com/c840124/v840124317/685bc/qXi400qTTxw.jpg

50% on CPU and 30% on GPU, but i only have 25 fps. Why?

I'm glad you like them :-) Make sure to check out the Atmosfear options too (I think they only appear if you press Esc after loading a save, not from the main menu when you first get into the game)

As for the FPS issue:
First thing to try is to disable "sun rays"
If that's not enough:
lower grass detail and shadow detail, and perhaps the HBAO or whatever it's called.
Oh and switch to DirectX10, it should be more stable and possibly faster, but you probably won't notice a visual difference.

If the game needs a long-ass time to load anything:
Make sure that Stalker COP does NOT run in Windows compatibility mode.

Also be aware that Stalker COP, even though it was released in 2010, still only uses one core. So even though you have 8 cores, Stalker is only using the one at 92% load..

It's also possible that you don't have enough VRAM (2 GB?), especially if you installed the high-res sky textures.

Okay, i'll try.

I'm on nv 1070 with 8gb :)