Extract to
steam/steamapps/youraccount/counter-strike source/cstrike


Then to change the skin, open the UV1.vmt in cstrike/materials/models/weapons/v_models in notepad and change :
"$baseTexture" "models\weapons\v_models\twink.thanez.scout\UV1"

to "$baseTexture" "models\weapons\v_models\twink.thanez.scout\UV1_us_woodland"

or whatever skin you want to then do the same to the UV1.vmt in w_models



UV1_original                      -Original
UV1_tactical_elite                -Tactical Elite
UV1_us_woodland                   -US Woodlands Camo
UV1_japan_selfdefence             -Japanese Self Defense Camo 
UV1_desert_camo                   -US Desert Camo 3
UV1_urban_city                    -Urban City Camo
UV1_redneck_edition               -Redneck Edition


