Multiple Targets for Single Model

Hello,

I am trying to optimize my game and make it easier for future updates. During these updates, more trackers will be added to display the same objects. I was wondering if it would be possible to add additional Image Target Behavior's to an existing set of models. If multiple targets could be parents to the same objects, I wouldn't need to copy the objects for each new target.

Are there any tools available that make this possible?

Thanks in advance