Klei,
In the previous thread you started on this topic, which you put in the right forum, Mendel said:
"You have to download and install manufacturer drivers for your graphics card. Windows XP does not support hardware OpenGL acceleration out of the box. Seems Billyboy does not like OpenGL, prefers directX."
This is true. Microsoft does not like OpenGL. When it says it support it, all it means is that it will run it in software mode. They do this so that Direct3D looks really fast in comparison if you don't get the correct drivers.
GLSetup can be found at http://www.glsetup.com" target='_blank'>http://www.glsetup.com.