How do I convert an XML insert into ordinary text?

I have a fm9 file, about half of it is in elements that can be directly edited through the structured view, but the other half seems to be ax xml insert which is awkward to edit. Is there any way to import this xml insert into the document so it consists of  'ordinary' elements alongside the elements already in there, and is also manageable in the same way as the elements already in the structured view. Thanks.