The source code and Visual Studio project files for the Set_FDCC_LGPO utility are included at an attachment to this post.
To build the project, you need Visual Studio 2005 and the Windows SDK. The current NIST FDCC policy files are included in the attachment; to build with updated policy files, the attachment includes a PowerShell script to collect files from a locally-extracted copy of the NIST GPO files.
Source code is provided "AS-IS" without warranty, and is not supported by Microsoft customer support.
[Attachment removed, as a newer version is available -- bookmark the landing page for the most up-to-date-links.]