Wacom Volito1 tablet

Do you have the package 'wacom-tools' installed?

Yes, and I've also tried installing linuxwacom nothing works.

Also tried this:
http://ubuntuforums.org/showthread.php?t=303555

How did you get the error message "No extend input devices" in gimp? Threw which dialog?

If you're experienced with the console, maybe you could try backing up your current xorg.conf, and try replacing your wacom fields with mine, followed by restarting X?:

Section "ServerLayout"
        Identifier "Default Layout"
        Screen 0 "aticonfig-Screen[0]" 0 0
        InputDevice "Generic Keyboard"
        InputDevice "Configured Mouse"
        InputDevice "stylus" "SendCoreEvents"
        InputDevice "cursor" "SendCoreEvents"
        InputDevice "eraser" "SendCoreEvents"
        Option "AIGLX" "true"
EndSection

Section "InputDevice"

                                                      # /dev/input/event
                                                      # for USB
        Identifier "stylus"
        Driver "wacom"
        Option "Device" "/dev/wacom" # Change to
        Option "Type" "stylus"
        Option "ForceDevice" "ISDV4" # Tablet PC ONLY
EndSection

Section "InputDevice"

                                                      # /dev/input/event
                                                      # for USB
        Identifier "eraser"
        Driver "wacom"
        Option "Device" "/dev/wacom" # Change to
        Option "Type" "eraser"
        Option "ForceDevice" "ISDV4" # Tablet PC ONLY
EndSection

Section "InputDevice"

                                                      # /dev/input/event
                                                      # for USB
        Identifier "cursor"
        Driver "wacom"
        Option "Device" "/dev/wacom" # Change to
        Option "Type" "cursor"
        Option "ForceDevice" "ISDV4" # Tablet PC ONLY
EndSection

Back when I was using debian, to get my wacom to work in all the apps, I had downloaded a live cd (knoppix iirc), and copy pasted the xorg.conf from the livecd onto my hard drive and used it.

I've tried your xorg.conf and didn't work :(

To get that error message i go to the menu File->Preferences->Input Devices and click in Configure Extended input devices.

Hmm... What about looking for a live CD that specialises in graphics editing on distrowatch.com , seeing if it works with gimp on it, and if it does, copying over the xorg.conf?
This is what a quick search turned up:
http://distrowatch.com/table.php?distribution=dynebolic

Does it work in krita or any other graphics editing app (in otherwords, is it just broken with GIMP and Inkscape)?

I've tried all that and nothing worked but now I got a Wacom Graphire4 and it's working fine :) (except when I use XGL, but that's not a big problem)

thanks any way :)

No problem, glad it works...