Second Gpu not detected

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http://crunchbang.org – found it tried it but still the job s not done....I seriously can't understand what is happening with xorg....I install the drivers, then i run nvidia-xconfig (sgfxi makes the same thing) and i have a very basic configuration. That configuration creates only ONE device section, so what i should do is to create a SECOND one, with a different name and the correct BusID. When i reboot, i DO see the 2nd gpu on the settings.Now if i go and add whatever i need in xorg.conf, i simply lose everything.... and not only that. Even if i restore the working configuration, i still don't see the se (HowTos)