"To add it to your startup applications, go to System
> Preferences > Startup Applications, click Add, put in any
Name and in the Command field, enter one of the two commands above
(whichever suits your graphic card).
"Note 1: Of course, you need Compiz enabled for this to work.
Read about it here if you don't know what i'm talking about.
"Note 2: On some old video cards and Intel cards, the OpenGL
mode shows a black screen but I just tested the updated drivers
(for Intel) from the repository for Intel and some other graphic
cards I wrote about and it worked in OpenGL mode."