The vehicles_for_clear_sky.zip file you have requested: Clear Sky / Mods / Vehicles / Vehicles for Clear Sky - 4.88mb 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:
This mod let you spawn some vehicles from the main menu. It is for the v188.8.131.52 of Clear Sky, but works on my 184.108.40.206 Russian version. Not tested on other version.