The clear_sky_invulnerable_trader_2.0.zip file you have requested: Clear Sky / Mods / Singleplayer / Clear Sky Invulnerable Trader - 2.21mb is not available. Perhaps try browsing all files for the game S.T.A.L.K.E.R.: Clear Sky and upload any files you want to share or are missing. This is the only information we could locate:
A fix for the Clear Sky trader, which prevents him from dying if you edit the trader files. Put into C program Files Deep Silver S.T.A.L.K.E.R. - Clear Sky folder.