[Zope] retro-fit zClasses with ObjectManager base class

[Trevor Toenjes]

Hi all.
I am new to Zope and trying to follow the subclass thread...it seems to
relate to my current problem.  So I was hoping to get some advice to what I
think is a more basic issue.

I am in a project using many zClasses and now need to add images to them.
However, I did not set them up with ObjectManager.

Is there a way to add ObjectManager to an existing zClass?
If not, is there a shortcut to import all the data from the existing zClass
to the new zClass(with images)?

Thanks for the help.
-Trevor Toenjes