AS3 3D rotation needs to change MC registration point

Hi Everyone,

I’m exploring right now the capabitilies of FlashCS4/AS3 3D X/Y/Z rotation BUT as I’m creating my shapes and M/C dynamically in an external I’m having a problem when I rotate my object, it starts rotation on 0,0,0 and I d’like to be able to change this registration point, I’ve tried to find an easy solution on may forums but I’m stuck, and would like to find a great solution.
Can you help me please ?
Thank you !