edit an XML instance document

Hi there!
   
  I'm using the XML Forms Generator to generate XForms from an XML instance file.
  But i would like to know how can i edit the XML instance document through the XForm GUI?
  i was thinking about using this submission method:
  <xforms:submission action="file:///temp/output.xml" method="put" id="submit"/>
  Okay, it works, but how can i open the instance XML form, back into an XForm, so that the user can add more content to the same XML instance?
   
  Thanks for your support and for the replies from before!

		
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