greater portage is an extension for the Windows buildtool
emerge. It contains scripts to build greater-admin and
greater-dbapi with postgresbackend on Windows.

For emerge documentation and how to obtain the software
please refer to:
http://techbase.kde.org/Getting_Started/Build/KDE4/Windows/emerge

To integrate with KDE emerge set your environment variable
EMERGE_PORTAGE_ROOT=%KDEROOT%\emerge\portage;<path2greater>\portage

then you can run emerge greater-admin to get the dbapi and the
Administration tool