If you want to mess with the latest version of OpenGL the latest Nvidia drivers don't include it.
You have to download the drivers here:
OpenGL 4.1 support. New July 2010
Windows driver version 259.31 and Linux drivers version 256.38.03 provide full support for OpenGL 4.1 and GLSL 4.10 on capable hardware. This driver also supports several new OpenGL extensions for both 4.1-capable GPUs and older GPUs. The driver download links are at the bottom of this page.