How can I make ubuntu completely black and white?

Question

I installed Ubuntu Tweak for the black and white theme. But that theme only made icons black and white. I want complete black and white feel for Ubuntu, how can I get it?

Complete means when I play an RGB video, it can be displayed in black and white.

I read:

• http://ubuntu-tweak.com/
  
• How to make ubuntu black and white?
• http://ubuntuforums.org/showthread.php?t=2143868