This MEL script is developed based on a tutorial from fahrenheitdigital.com, letting you creat a free form bone system that can be replaced and used in places like abdominal spine or neck or etc. The interface is developed by QT and the script can be used in Maya 2011.
For  using it, unack files in your script directory, open maya and source the script, then use "CSS_Ribbon;" command and the interface will be loaded.
Have fun!