I could then take my existing keywords and re-arrange them by dragging and dropping into various categories and structures.
this would be a really a very useful way to re-arrange, as shadow says, your own structured list of keywords, as many times you need move words onto different level , now this is a complex task to do into the text file, drag and drop the words into the structure keywords pane itself would be a really, really great advanced in the daily work, thanks