Attached Link: http://www.philc.net/PTB_page2.php#facePutty

http://www.philc.net/PTB_page2.php#facePutty

Just load the figure and the cage into any 3D modeling application and shape the cage as required.

You can even make a new cage from scratch if required providing that you keep the same naming convention. Suggest that you keep the vertices under 100 or else Poser will slow down too much when the magnets are applied.