Don´t think you can create a new scene (Stencyl scene) on the fly, but you could use a fixed scene and change the contents to make it look "new". If you store attributes for the content in a list of lists (comma separated, one for each scene) it should be possible to maintain and store several scenes.
List of lists are, however, a bit of a tongue in cheek exercise. :-)
From your main scene you could then create buttons dynamically for each entry in the "scenes" list.