[vtkusers] rotating the whole assembly

[Xu Zhong Hao]

Hi,

can anyone advice me how to select the whole assmebly of actors and 
image actors as illustrated in medical3

i need to get the whole assmebly of actors and image actors to rotate 
and get a single transformation matrix so that next time i run the 
program, the skull in the medical3 can rotate to the correct 
orientation i want.

right now, i am only able to pick the skin and bone actors to rotate 
but the image actors remain though i put them all in to the 
vtkpropassembly

thanks for any help

Zhong Hao