Node Cloning, Specialty

Would anyone know the best way I could go about "cloning" nodes in a current Drupal site? I should say, more accurately, how to allow the user to clone them. I know of the node clone module but unfortunately it is very limited (Can't clone Filefield CCK and doesn't clone complex Content Types) and does not meet my need. I could use some PHP but I don't know how I should start out.

Basically I have Content Types linked together using the Node Relativity module. I need to be able to clone the parent and have all of its children be cloned into the new parent as well.