It has been a few weeks since I installed an Intuos2 onto Xorg 6.8.1, my recollection is that the installation was fairly similar to the Graphire 2 (see 6.4). Here is the relevant section in /etc/X11/XF86config...
Driver "wacom"
Identifier "Mouse[9]"
Option "Device" "/dev/input/event4"
Option "InputFashion" "Tablet"
Option "Mode" "Absolute"
Option "Name" "GRAPHIRE / INTUOS (USB)"
Option "Protocol" "Auto"
Option "SendCoreEvents" "on"
Option "Tilt" "on"
Option "Type" "cursor"
Option "USB" "on"
Option "Vendor" "WACOM"
EndSection
Section "InputDevice"
Driver "wacom"
Identifier "Mouse[11]"
Option "Device" "/dev/input/event4"
Option "InputFashion" "Pen"
Option "Mode" "Absolute"
Option "Name" "GRAPHIRE / INTUOS Stylus (USB)"
Option "Protocol" "Auto"
Option "SendCoreEvents" "on"
Option "Tilt" "on"
Option "Type" "stylus''
Option "USB" "on"
Option "Vendor" "WACOM"
EndSection
Section "InputDevice"
Driver "wacom"
Identifier "Mouse[13]"
Option "Device" "/dev/input/event4"
Option "InputFashion" "Eraser"
Option "Mode" "Absolute"
Option "Name" "GRAPHIRE / INTUOS Eraser (USB)"
Option "Protocol" "Auto"
Option "SendCoreEvents" "on"
Option "Tilt" "on"
Option "Type" "eraser"
Option "USB" "on"
Option "Vendor" "WACOM"
EndSection
InputDevice "Mouse[9]" "SendCoreEvents"
InputDevice "Mouse[11]" "SendCoreEvents"
InputDevice "Mouse[13]" "SendCoreEvents"
EndSection