A really easy installation, mods are already install, just drag and drop Bin and Gamedata !
First loading can be long with mods (so don't panic), but after in game it's alright, the loading is fast ! (depend on the computer)
With this version you just have to copy or cut two folders (Bin & Gamedata) into the game's installation folder and you can play ! use the Tweaked User_ltx (by Thales100 and it comes from his mod page in the description) for better Tweaked User_ltx and I'v e already tweaked it for prevent crash, so you can play directly after install ! (but if you prefer use your user.ltx, go see the description on this file : Moddb.com )
You need to unpack the Part 1 & Part 2 together !
List of mods installed in the gamadata :
AtmosFear 3
Absolute Nature 4 & Absolutes Structures
Original Weapons Renewal 3 (yes, OWR3 was made compatible with Atmosfear 3)
Stalker Two-K
FX Pack Addon for better audio & (textures) FX (from Stalker-Two K)
Variation Mod
A very little "Bonus Mods" folder exist, just drag and drop what you want and replace if ask, Better Flashlight Short Range 32 meters (there is a 50 meters version in the mod's file) and Nightvisons Animated Green (4 differents versions exist in the mod's file) are already installed in the gamedata ! (from Stalker-Two K)
You just need to choose if you want install : Nano HUD, new Loading Screens, DX_10_11_scopes (if you use DirectX 10 or 11), or not, that's it ! (from AtmosFear 3 and OWR3)
