The tutorial is in the Planet Cake book so you won't (or hopefully won't) find a tutorial online as it is copyrighted. This thread has tips on the process and you can get the general jist on how to do it by reading this link http://www.planetcaketeaparty.com.au/forum-view.php?id=978
This is from krstarica by zlatna koka.
And by Pitoncica:
What a great idea! Thanks for sharing!
Thanks, Stana! That helps a lot!