Ah! Well, WHILE it is subdivided, this is not possible because the number of vertexes in the figure is completely different. But doesnt zbrush allow to "unsubdivide" returning to the same structure as before subdivision? At least I saw that in a zbrush tutorial video or maybe even on wikipedia, but I do not have a copy so I cannot tell. Maybe someone here can?

No need. It appears I'm the only one doing this. I think I can hack a subdivided default mesh into a cr2 and use that as a control obj so the vertice order does not change.