install by putting the nav, kv, and bsp file into your maps directory..

default is 
c:/program files(x86)/steam/steamapps/common/counter-strike global offensive/csgo/maps

and put the swf file into
c:/program files(x86)/steam/steamapps/common/counter-strike global offensive/csgo/resource/flash

and put the txt and dds files into 
c:/program files(x86)/steam/steamapps/common/counter-strike global offensive/csgo/resource/overviews



Sci-fi textures by Philip Klevestav - http://philipk.net/
skybox texture by Burnfingers - http://gamebanana.com/css/textures/1931