1) Extract to: C:\Program Files\valve\steam\steamapps\(your steam username)\counter-strike Source\cstrike
2) Run CS:S then make a LAN server and select map "Aim_smallarena" ( You can add bots, it only takes about 15 seconds to sample walkable space! )
1) Need more screenshots.
2) Needs lighting (add a light_environment)
3) Try and add displacements and maybe some decals and use entitys for the ladders instead of just the ugly ladder textures.
4) If you can, add a 3D skybox.
Nice layout but, need improvements