Hello Kroll,
the Skin Editor is the simple way to make a skin for the VLC Player. Most parts on it are related to the skins2 dtd and give you a graphical WYSIWYG envoirement. If you add a button in the skin editor, they create a line of code in the xml, that you else had to do with your own hand. Many of the editor functions have a help icon near to them.
Along with the Help you mentioned, there is another Guide that explain a bit:
viewtopic.php?f=15&t=39609
You should remember that it is essentially for bug fixing and better workflow to know what you are doing. It does´t help you if the "push x and push y" fails and you don´t know why.
Read a bit of the guide and open the default skin in the editor to see how it works. At least, the Skins2 documentation give examples for every feature.
It won´t help you if i write hints to press x and y to do that, on every error occuring, you´re back to ask whats wrong then
Edit: The mentioned Skins2 documentation works again now:
http://www.videolan.org/vlc/skins2-create.html