Geometry switching has been around as long as there has BEEN a Poser program.  Tried and true.  You might want to look into that.  Plenty of people around here know how to do it.  I don't, but SIxus1 or Philc might be worth asking for some advice.

I cannot save the world. Only my little piece of it. If we all act together, we can save the world.--Nelson Mandela
An  inconsistent hobgoblin is the fool of little minds
Taking "Just do it" to a whole new level!