Thanks. I don't know really how to use it either, but fortunately my father's computer is powerful so I could try several different combinations of settings and preview it live. I guess I'll learn how to better use it over time.
yep, well good luck with it! I also found a much simpler photo-stitching software called Microsoft Image Composite Editor (ICE). It works pretty well for not having to manipulate any controls, but there are some disadvantages such as lack of controls such as all the tools in hugin.