External display on a iBook

[Saladino <arkato@gmail.com>]

Hi
Im trying to use the video output to use it with a projector.
I use xorg 6.9 from apt in a new iBook.
My xorg.conf now is:
Section "Device"
       Identifier      "ATI Technologies, Inc. M11 NV [FireGL Mobility T2e]"
       Driver          "ati"
       BusID           "PCI:0:16:0"
       VideoRam        32000
#        Option          "UseFBDev"              "true"
       Option          "MergedFB" "true"
       Option          "CRT2Position" "Clone"
#       Option          "DDCMode" "true"
#       Option          "CloneMode" "1280x1024"
       Option          "MetaModes" "1280x1024 1280x854-1024x768
1024x768-1024x768 800x600-800x600"
       Option          "CRT2HSync" "31.5-80"
       Option          "CRT2VRefresh" "56.3-75"
       Option          "AccelMethod"           "exa"

EndSection

With that i see the same in a external display and in the laptop lcd,
but i like the fbdev. Is there a way to use it with fbdev?
Could i configure the xorg to change dinamically from tft to external
and to external & tft or its imposible?
Is it the same a external display and a projector? i have'ny got any
projector to try it. :)
Thanks for your time.
Saladino