I'm not sure what you mean?

There is no reason you cannot create your own morphs, you cannot create HD morphs based on SubD Geometry, but making a normal morph is pretty straight forward.

This would be a good place to start:

http://docs.daz3d.com/doku.php/public/software/dazstudio/4/userguide/creating_content/modeling/tutorials/pbms/start