...
If you plan to use CMake from command line check this option:
From GUI
...
Now click on Configure, it will ask you to choose a generator, select Visual Studio 9 2008 and click on Finish.
Other generators could work too such as: Visual Studio 9 2008 Win64 (if you installed Windows SDK 64 bits compilers) or other versions of Visual Studio.
...
If you want to enable or disable options, you will need to click again on Configure and Generate.
The solution C:\ryzom\code\build\RyzomCore.sln has been generated, you can double-click to open it in Visual C++ and press F7 to compile all projects.
...