Breakable Objects

I’ve looked everywhere and can’t seem to find how to make multiple breakable objects. I want to create a body with different parts that break apart on collision. However I’ve looked all over google and the only hint I can really find is “Instead it is better to create breakable bodies starting with a single body with multiple fixtures. When the body breaks, you can destroy a fixture and recreate it on a new body.” does anyone have any idea how to implement this in corona. 

aka how do I implement this into corona.

http://www.box2d.org/forum/viewtopic.php?f=3&t=836&sid=3d77133b9c08e46a7aa7c3326510a8ca