Mine

Section "Module"
    Load        "dbe"   # Double buffer extension
    SubSection  "extmod"
      Option    "omit xfree86-dga"   # don't initialise the DGA extension
    EndSubSection
    Load        "type1"
    Load        "freetype"
    Load       "glx"
    Load       "dri"
EndSection
Section "Files"
    RgbPath     "/usr/X11R6/lib/X11/rgb"
    FontPath   "/usr/X11R6/lib/X11/fonts/misc/"
    FontPath   "/usr/X11R6/lib/X11/fonts/TTF/"
    FontPath   "/usr/X11R6/lib/X11/fonts/Type1/"
    FontPath   "/usr/X11R6/lib/X11/fonts/75dpi/"
    FontPath   "/usr/X11R6/lib/X11/fonts/100dpi/"
    FontPath   "/usr/X11R6/lib/X11/fonts/local/"
EndSection
Section "ServerFlags"
EndSection
Section "InputDevice"
    Identifier  "Keyboard1"
    Driver      "kbd"
    Option "AutoRepeat" "500 30"
    Option "XkbRules"   "xorg"
    Option "XkbModel"   "microsoft"
    Option "XkbLayout"  "us"
    Option "XkbVariant" "dvorak"
EndSection
Section "InputDevice"
    Identifier  "Mouse1"
    Driver      "mouse"
    Option "Protocol"    "SysMouse"     # SysMouse
    Option "Device"      "/dev/sysmouse"
    Option "ZAxisMapping"   "4 5"
        Option "Buttons" "12"
EndSection
 Section "InputDevice"
 Identifier "mx610"
 Driver "mouse"
 Option "CorePointer"
Option "Device" "/dev/ums0"
 Option "Protocol" "ImPS/2"
 Option "Emulate3Buttons" "false"
 Option "Buttons" "5"
 Option "ZAxisMapping" "4 5"
 Option "ButtonMapping" "1 2 3 6 7"
 Option "Resolution" "800"
 EndSection
Section "Monitor"
    Identifier  "mon0"
    HorizSync   31.5 - 64.3
    VertRefresh 50-100
EndSection
Section "Device"
    Identifier  "Standard VGA"
    VendorName  "Unknown"
    BoardName   "Unknown"
    Driver     "vga"
EndSection
Section "Device"
    Identifier  "dev0"
    Driver      "nvidia"
BusID "PCI:1:0:0"
        # unsupported card
    #VideoRam    262144
    # Insert Clocks lines here if appropriate
Option "RenderAccel" "true"
Option  "TwinView"      "yes"
Option  "MetaModes"     "1280x1024,1280x1024"
Option  "AllowGLXWithComposite" "yes"
EndSection
Section "Screen"
    Identifier  "Screen0"
    Device      "dev0"
    Monitor     "mon0"
    DefaultDepth 24
    Subsection "Display"
        Depth       8
        Modes       "1280x1024" "1024x768" "800x600" "640x480"
        ViewPort    0 0
    EndSubsection
    Subsection "Display"
        Depth       16
        Modes       "1280x1024" "1024x768" "800x600" "640x480"
        ViewPort    0 0
    EndSubsection
    Subsection "Display"
        Depth       24
        Modes       "1280x1024" "1024x768" "800x600" "640x480"
        ViewPort    0 0
    EndSubsection
EndSection
Section "ServerLayout"
    Identifier  "Simple Layout"
    Screen "Screen0" 0 0
    InputDevice "Mouse1" "CorePointer"
    InputDevice "Keyboard1" "CoreKeyboard"
EndSection
Section "DRI"
   Mode 0666
EndSection
Section "Extensions"
        Option "Composite" "Enable"
EndSection