Adding an LzDataElement to a LzDataPath or DataSet?

Is it possible to add a complex LzDataElement (multiple children)  
directly to a dataset? This seems overly complex.

I'm replicating over a series of nodes, generating some viewable areas  
and a form at the bottom. I assemble an LzDataElement in the  
onmousedown event of the forms submit button. I understand that I can  
set up a new datapointer, point it to the same node in the dataset as  
it's parent replicated datapath, and then add a single node, but how  
can I append a complex LzDataElement?

Regards,
Ken