Something

Section "ServerLayout"
    Identifier     "X.org Configured"
    Option         "AIGLX"  "true"
    Screen      0  "Screen0"
    Screen      1  "Screen0 (2nd)" RightOf "Screen0"
    InputDevice    "Mouse0" "CorePointer"
    InputDevice    "Keyboard0" "CoreKeyboard"
EndSection

Section "Extensions"
   Option "Composite" "true"
EndSection

Section "Files"
    RgbPath         "/usr/share/X11/rgb"
    ModulePath      "/usr/lib/xorg/modules"
    FontPath        "/usr/share/fonts/misc"
    FontPath        "/usr/share/fonts/75dpi"
    FontPath        "/usr/share/fonts/100dpi"
    FontPath        "/usr/share/fonts/TTF"
    FontPath        "/usr/share/fonts/Type1"
EndSection

Section "Module"
    Load           "extmod"
    Load           "dbe"
    Load           "record"
    Load           "xtrap"
    Load           "glx"
    Load           "freetype"
    Load           "type1"
EndSection

Section "InputDevice"
    Identifier     "Keyboard0"
    Driver         "kbd"
EndSection

Section "InputDevice"
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/input/mice"
    Option         "ZAxisMapping" "4 5 6 7"
EndSection

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Monitor Vendor"
    ModelName      "Monitor Model"
    Option         "DPMS"
EndSection

Section "Device"
    Identifier    "Card0"
    Driver         "nvidia"
    VendorName     "nVidia Corporation"
    BoardName      "NV36.1 [GeForce FX 5700 Ultra]"
    BusID          "PCI:5:0:0"
    Screen          0
    Option      "AddARGBGLXVisuals"     "true" 
EndSection

Section "Device"
    Identifier     "Card0 (2nd)"
    Driver         "nvidia"
    VendorName     "nVidia Corporation"
    BoardName      "NV36.1 [GeForce FX 5700 Ultra]"
    BusID          "PCI:5:0:0"
    Screen          1
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Card0"
    Monitor        "Monitor0"
    SubSection     "Display"
        Viewport    0 0
    EndSubSection
    SubSection     "Display"
        Viewport    0 0
        Depth       4
    EndSubSection
    SubSection     "Display"
        Viewport    0 0
        Depth       8
    EndSubSection
    SubSection     "Display"
        Viewport    0 0
        Depth       15
    EndSubSection
    SubSection     "Display"
        Viewport    0 0
        Depth       16
    EndSubSection
    SubSection     "Display"
        Viewport    0 0
        Depth       24
    EndSubSection
EndSection

Section "Screen"
    Identifier     "Screen0 (2nd)"
    Device         "Card0 (2nd)"
    Monitor        "Monitor0"
    SubSection     "Display"
        Viewport    0 0
    EndSubSection
    SubSection     "Display"
        Viewport    0 0
        Depth       4
    EndSubSection
    SubSection     "Display"
        Viewport    0 0
        Depth       8
    EndSubSection
    SubSection     "Display"
        Viewport    0 0
        Depth       15
    EndSubSection
    SubSection     "Display"
        Viewport    0 0
        Depth       16
    EndSubSection
    SubSection     "Display"
        Viewport    0 0
        Depth       24
    EndSubSection
EndSection

[arjan@Werkbak gnome-network-manager]$