STEPS:
1: Choose which version you want to use, either the LAM(Lazer) Version or NO LAM(No lazer) version.
2: Open the folder of which version you want to use. inside either folders, there should be 3 folders
each saying, materials, sound, and models.
3: Copy all of these 4 folders into your steam/steamapps/your account name/counter-strike source/cstrike folder.

Thats all!! 