Ok so i just downloaded the mod both full and base. i have placed the latest patch on the game. i run it with steam and then

it crashes
and then this happens
Expression : file
Function : CResourceManager::_CreatePS
File : D:\prog_repository\sources\trunk\Layers\xrRender\ResourceManager_Resources.cpp
Line : 240
Description : c:\program files (x86)\steam\steamapps\common\stalker call of pripyat\gamedata\shaders\r2\accum_sun_cascade.ps
no idea what this means but it happens