STALKER Clear Sky
Affinity Fix Quad Core (0.1)
Insert File into the Clear Sky Directory and execute. It should launch Stalker - Clear Sky then wait 30 seconds and set the affinity on the xrEngine.exe process to use four cores instead of just one. This helped make the game run smoother for me,
This file executes STALKER - Clear Sky, waits for 30 seconds and then sets the affinity to all four cores.