After some time, I have managed to write a new article.
It is based on the fact that we have moved some of our servers to the server hosting company located at Germany, that doesn’t officially support FreeBSD. They actually allow their customers to install FreeBSD over the remote console, but that costs some money.
However, thanks to Martin Matuska, we have found a way to install FreeBSD on our boxes without the need of the remote console. The idea is somehow based on the depinguinator project, but works with the latest versions of FreeBSD.
Please read the whole article at http://www.freebsd.org/doc/en_US.ISO8859-1/articles/remote-install/ to get the idea.
Remote Installer can also do this. It is a program that silently installs and uninstalls software on remote computers at the click of a button.