Download GeForce Forceware 182.52 Vista 32-bit driver
NVIDIA released a new driver, originally intended for developers though. Windows drivers version 182.52 drivers version 180.37.05 provide beta support for OpenGL 3.1 and GLSL 1.40 support (as well as full OpenGL 3.0 and GLSL 1.30 support).
We have a discussion thread open on these drivers right here.
You need one of the following graphics cards to get access to the OpenGL 3.1 and GLSL 1.40 functionality: