Move the gamedata folder from the mod archive into your main S.T.A.L.K.E.R. installation folder (e.g., C:\Program Files (x86)\Steam\steamapps\common\STALKER Clear Sky ). Edit fsgame.ltx: Find the fsgame.ltx file in your game's root directory.
Since this is an older mod, installation typically follows the standard manual process for S.T.A.L.K.E.R. games: skachat mod dlia chn krov i pulia
Because this mod is from 2010, many original links may be inactive. Community forums such as the Fishing Forum (Russian) or specialized S.T.A.L.K.E.R. modding sites are the best places to look for mirrors. Move the gamedata folder from the mod archive