Never heard of it, but it seems to be an animated constraint system.
Did you read the readme file? It says:
3. In Maya open the Script Editor and go to the Python tab, copy and paste these two rows below:
import ZvParentMaster
ZvParentMaster.ZvParentMaster()
4. Highlight it and click on "Save Script to Shelf...", specify a name and click "OK".
This should sort it out.
Imagination is more important than knowledge.