configuração tablet Genius Mouse pen 8x6 Ubuntu 7.04 (mesa digitalizadora)

[Leon Prado]

Ola caros amigos, nao consigo configurar corretamente minha mesa digitalizadora, uma Genius mousepen 8x6.
aparente mente o ubuntu 7.04, versão que uso, identificou ela como uma wacon 6x4...
gostaria de saber como faço para configura-la corretamente.
seque abaixo o que esta escrito no meu arquivo xorg.conf
abraços

# /etc/X11/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(5) 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 "Files"
   Fontpath   "/usr/share/fonts/X11/misc"
   Fontpath   "/usr/share/fonts/X11/cyrillic"
   Fontpath   "/usr/share/fonts/X11/100dpi/:unscaled"
   Fontpath   "/usr/share/fonts/X11/75dpi/:unscaled"
   Fontpath   "/usr/share/fonts/X11/Type1"
   Fontpath   "/usr/share/fonts/X11/100dpi"
   Fontpath   "/usr/share/fonts/X11/75dpi"
   # path to defoma fonts
   Fontpath   "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
EndSection

Section "Module"
   Load      "i2c"
   Load      "bitmap"
   Load      "ddc"
   Load      "extmod"
   Load      "freetype"
   Load      "glx"
   Load      "int10"
   Load      "vbe"
EndSection

Section "InputDevice"
   Identifier   "Generic Keyboard"
   Driver      "kbd"
   Option      "CoreKeyboard"
   Option      "XkbRules"   "xorg"
   Option      "XkbModel"   "abnt2"
   Option      "XkbLayout"   "br"
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 "InputDevice"
   Driver      "wacom"
   Identifier   "stylus"
   Option      "Device"   "/dev/input/wacom"
   Option      "Type"   "stylus"
   Option      "ForceDevice"   "ISDV4"# Tablet PC ONLY
EndSection

Section "InputDevice"
   Driver      "wacom"
   Identifier   "eraser"
   Option      "Device"   "/dev/input/wacom"
   Option      "Type"   "eraser"
   Option      "ForceDevice"   "ISDV4"# Tablet PC ONLY
EndSection

Section "InputDevice"
   Driver      "wacom"
   Identifier   "cursor"
   Option      "Device"   "/dev/input/wacom"
   Option      "Type"   "cursor"
   Option      "ForceDevice"   "ISDV4"# Tablet PC ONLY
EndSection

Section "Device"
   Identifier   "nVidia Corporation NV43 [GeForce 6600]"
   Driver      "nvidia"
   Busid      "PCI:1:0:0"
   Option      "AddARGBVisuals"   "True"
   Option      "AddARGBGLXVisuals"   "True"
   Option      "NoLogo"   "True"
EndSection

Section "Monitor"
   Identifier   "Monitor Genérico"
   Option      "DPMS"
   HorizSync 30-72
   VertRefresh 50-150
   Modeline "1024x768" 44.90 1024 1032 1208 1264 768 768 776 817 interlace +hsync +vsync
EndSection

Section "Screen"
   Identifier   "Default Screen"
   Device      "nVidia Corporation NV43 [GeForce 6600]"
   Monitor      "Monitor Genérico"
   Defaultdepth   24
   SubSection "Display"
      Depth   1
      Modes      "1024x768"   "800x600"   "640x480"
   EndSubSection
   SubSection "Display"
      Depth   4
      Modes      "1024x768"   "800x600"   "640x480"
   EndSubSection
   SubSection "Display"
      Depth   8
      Modes      "1024x768"   "800x600"   "640x480"
   EndSubSection
   SubSection "Display"
      Depth   15
      Modes      "1024x768"   "800x600"   "640x480"
   EndSubSection
   SubSection "Display"
      Depth   16
      Modes      "1024x768"   "800x600"   "640x480"
   EndSubSection
   SubSection "Display"
      Depth   24
      Modes      "1024x768"   "800x600"   "640x480"
   EndSubSection
EndSection

Section "ServerLayout"
   Identifier   "Default Layout"
  screen "Default Screen"
   Inputdevice   "Generic Keyboard"
   Inputdevice   "Configured Mouse"
   Inputdevice   "stylus"   "SendCoreEvents"
   Inputdevice   "cursor"   "SendCoreEvents"
   Inputdevice   "eraser"   "SendCoreEvents"
EndSection

Section "DRI"
   Mode   0666
EndSection