Crack for Russian version of S.T.A.L.K.E.R: Clear Sky (english can be used but just this release - http://www.mininova.org/tor/1759905)
Read NFO file!
Add to NFO file:
After applying patch:
Open your fsgame.ltx and see to first line. Can looks like this:
$app_data_root$=true|false|C:\Documents and Settings\All Users\Documents\STALKER-STCS\
There is path to your STALKER DOCUMENT DIRECTORY (for your settings, saves, etc).
Check if this path is correct. If so, then leave without change. If not, correct it by yourself (but that path must EXIST and must be CORRECT!) and save.