Hi I ve just downloaded steam. I can play in some servers when I wanna join servers via this site, it says:
"Unable to launch requested game as it was not detected as installed. Please setup requested game and try launching again."

I understand, I need to launch cs but its already here.. I can't find in the games either..

What should I do??

Please review http://www.gametracker.com/forums/forum.php?site=1&thread=72341 and let me know if manually adding it works.