Note my wordpress version is 3.3.1
some hooks and function is not the same anymore, and the info on wordpress.org is not actually helping.
all I want to do is adding and customize the default behavior about, so any post to provide?
How to add custom button and new features in TinyMCE in wordpress3.3
Here is a link on how to add a button: http://www.tinymce.com/wiki.php/API3:method.tinymce.Editor.addButton
All you need to so is to adjust your wordpress settings regarding the tinymce init.