Extract the archieves on "REQUIRED" to:
C:/Program Files/Steam/steamapps/"your name here"/counterstrike source/cstrike

Select your texture and extract it to:
C:/Program Files/Steam/steamapps/"your name here"/counterstrike source/cstrike/materials/models/weapons/v_models/philibuste_aug_a3

Any problems please contact Rimuto!

Thanks!