what is the best way of adding physics options to nodes in cocosbuilder's designer?

Hi all
i want to add physics info(like radius, width, height, friction, elasticity, mass) for any of the nodes that i drag on my layers in cocosbuilder in designer so then at runtime and in the codes, i can apply correct physics to each of nodes.
how can i achieve this? what is the best way?

I also created a simple example that does this using node’s tag property and fixed informations for each tag, here: http://www.cocos2d-x.org/boards/20/topics/30032?r=30293#message-30293