Ok my question is what should i do to have just half size of monitor in-game, like on some big tur. when "they" have LCD and they use just half of their monitor size in-game cs.

My monitor refresh rate is "75" i have Philips 20' monitor.
Graphic: NVidia GeForce 9500GT

Here is a example
http://www.sk-gaming.com/photo/282031

can u help me?

go play 640x480?