How do I maximize application to two displays using TwinView

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 1.0  (buildmeister@builder3)  Wed Sep 12 14:30:30 PDT 2007
 
# xorg.conf (xorg X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
#   sudo dpkg-reconfigure -phigh xserver-xorg
 
Section "ServerLayout"
 
    Identifier     "Default Layout"
    Screen      0  "Screen0" 0 0
    InputDevice    "Generic Keyboard"
    InputDevice    "Configured Mouse"
EndSection
 
Section "Files"
EndSection
 
Section "Module"
EndSection
 
Section "ServerFlags"
    Option         "Xinerama" "0"
EndSection
 
Section "InputDevice"
    Identifier     "Generic Keyboard"
    Driver         "kbd"
    Option         "CoreKeyboard"
    Option         "XkbRules" "xorg"
    Option         "XkbModel" "pc105"
    Option         "XkbLayout" "se"
EndSection
 
Section "InputDevice"
    Identifier     "Configured Mouse"
    Driver         "mouse"
    Option         "CorePointer"
    Option         "Device" "/dev/input/mice"
    Option         "Protocol" "ImPS/2"
    Option         "ZAxisMapping" "4 5"
    Option         "Emulate3Buttons" "true"
EndSection
 
Section "Monitor"
    Identifier     "Allmän skärm"
    HorizSync       30.0 - 65.0
    VertRefresh     50.0 - 75.0
    Option         "DPMS"
EndSection
 
Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "PMT"
    HorizSync       31.0 - 92.0
    VertRefresh     50.0 - 85.0
EndSection
 
Section "Device"
    Identifier     "nVidia Corporation NV34 [GeForce FX 5200]"
    Driver         "nvidia"
    Option         "UseFBDev" "true"
    BusID          "PCI:0:20:0"
EndSection
 
Section "Device"
    Identifier     "Videocard0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce FX 5200"
EndSection
 
Section "Screen"
    Identifier     "Default Screen"
    Device         "nVidia Corporation NV34 [GeForce FX 5200]"
    Monitor        "Allmän skärm"
    DefaultDepth    24
    SubSection     "Display"
        Modes      "1280x1024" "1280x960" "1024x768" "800x600" "640x480"
    EndSubSection
EndSection
 
Section "Screen"
    Identifier     "Screen0"
    Device         "Videocard0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "TwinView" "1"
    Option         "metamodes" "DFP-0: 1280x1024 +0+0, DFP-1: nvidia-auto-select +1280+0; DFP-0: 1280x960 +0+0, DFP-1: nvidia-auto-select +1280+0; DFP-0: 1024x768 +0+0, DFP-1: nvidia-auto-select +1024+0; DFP-0: 800x600 +0+0, DFP-1: nvidia-auto-select +800+0; DFP-0: 640x480 +0+0, DFP-1: nvidia-auto-select +640+0"
EndSection