If you have a credit card, you can download steam from http://www.steampowered.com or copy the game from someone else with a proper version. Then once you have steam and all the game files, create a new steam username and buy css over steam using your credit card.
I bought Half Life 2 + CS Source + Half Life 2 Death Match + Half Life Source all in one, but i can't play, steam is updating the games at the moment but its taking forever, isnt there a easier way?