2 external monitors + laptop screen?

I have an ATI Mobility Radeon HD 4250 graphics card on my laptop. I have 2 external monitors plugged in, one through hdmi and the other through vga. The computer can see both, but I can only activate 2 of my 3 screens at one time. Either 2 externals, or 1 external and laptop screen.

I do web design and development and to me more screens is more love :) so is there any open source firmware, or any other way to get both external ports AND the laptop screen to work at the same time?
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More about external monitors laptop screen
  1. It's almost impossible to find a laptop that allows onboard monitor plus two external monitors at the same time.
    Even getting two external monitors working is hard to find. It generally involves either a USB video adapter or a multi-monitor splitter like the Matrox Dual-Head2Go.

    Many people would be interested to know exactly what model computer you have and what version of Windows.
    Could you post that?
  2. I have the same problem:

    - I have a Dell Inspiron 15R (N5010) laptop, Windows 7
    - ATI Mobility Radeon HD 5650
    - Dell 23" - ST2320L conected via HDMI
    - Acer 19" - AL1916W connected via VGA

    please help me...
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