Create USE_GNOME chapter for the porters handbook. This has 2 chapters, one basic chapter explaining the macro's and one chapter with all the components.
Loosely based on the old porting guide (http://freebsd.org/gnome) and the Qt chapter.
Live version of the patch (with updates as the patch get reviewed fixes) http://rainbow-runner.nl/freebsd-doc/en_US.ISO8859-1/books/porters-handbook/using-gnome.html