Installation:

1)Extract cssgui_bf2142.zip to the folder your in.
2)Keep the folder your in with the GUI open and go to C:\Program Files\Valve\Steam\SteamApps\YourName\counter-strike source\cstrike
3)Now put folder resources in cstrike and put console in materials.

There you go it's installed.  Now just start up Counter-Strike Source and take a look it.

Credits:

Fallen-Angel