Toshiba satellite turn off backlight OR turn off back light

[Cybercherub]

I want to turn off the backlight of my Toshiba Satellite 2415-S205 Laptop so that I can use it in transflective mode (say, in sunlight).There are Linux programs to do this, but none for XP, and I can't find this option in any of the Toshiba Utilities that came with the machine.

 

[r_manic]

Can't you just set brightness to absolute minimum?

 

[Cybercherub]

It's not enough. I'm also hoping to use the screen as a cheap spatial light modulator.