My German is a bit rusty, thank God for Google Translate!
đź‘Ť for great article!
Oops sorry - there is also an english tutorial:
http://diy-machine.blogspot.com/2011/01/new-english-tutorial.html
And also for french people:
http://diy-machine.blogspot.com/2011/02/nouveau-tutoriel-en-francais.html