For version 2.0, you must build the project from source.
Here’s what you will need:
- The OpenCV installer.
- CMake. Here’s the CMake installer.
- Instructions for using CMake to install OpenCV-2.0.01-win32. Those instructions need an extra step if you are using a vc++ Express edition. In that case you must un-check ENABLE_OPENMP when running the CMake GUI.
- Instructions for setting up an application project. (Thanks to mloskot for this find.)