STEPS:
1: Choose the Texture Type you want to use, either Normal, Pearl, or Gold(Look at the screenshot for 
texture comparison).
2: Open the folder of which texture you want to use. inside either folders, there should be 4 folders
each named, materials, scripts, sound, and models.
3: Copy all of these 4 folders into your program files/steam/steamapps/your account name/counter-strike source/cstrike folder.

Thats all!! Enjoy Pwning!!