This tip is originally from Hood
http://www.pixolator.com/zbc/showthread.php?p=611794#post611794
BUT did you know that you can also use the Zproject brush on your mesh with the Zsphere 2 layer as a subtool?
Cool, huh?
Cheers,
Paul
(mix_mash)
PS: might make a tute about this. Appropriate credit would be given to Hood for his tip if I make the tute, of course.