This tarball should be extracted inside the top directory of an Etherboot distribution and will create a subdirectory called doc. This is so that the references to the files src/NIC and src/Config will work when rebuilding the documentation. All these files, except a few in html for the website, are derived from masters in the sgml directory. So please edit those. The documentation is also online at http://www.etherboot.org/. You should consult that for the most up-to-date news.