emerge / emerge.py is a tool to build the kde sources and its third party requirements on MS Windows.
To start an emerge based install, checkout the sources from the svn-directory trunk/kdesupport/kdewin32/emerge into a new kderoot directory. Copy the file kdesettings-environment.bat into the folder kderoot\etc, rename it to kdesettings.bat and change it according to your needs.
You can get some help if you run:
emerge.py is not yet usable together with the kdewin-installer but we're currently working on it.