Setup a Second Monitor?

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http://crunchbanglinux.org – Currently, I have installed the nvidia drivers as I was instructed and though I can see a significant change in resolutions, I am currently unable to expand my screen to my second monitor. After tinkering and breaking xorg a couple of times, I figured it may just be better to ask you guys how it is properly done. I have seen a couple of example xorg configuration files and supposedly there is something I am supposed to do through nvidia to enable Twinview (I believe that is the correct feature). Can I have confirmation on this? I have the Nvidia GTS 450 in case that means something special. (HowTos)