hello, welcome to the site. i'm sure you're not disturbing anyone at all
have you looked into xslt yet? it's basically a way to make a style sheet for XML data.
you would need to include the xslt files along with the xml files on the disk, but then the therapist would be able to view a neatly formatted document which is populated by your xml file, all client side.
http://www.w3schools.com/xsl/default.asp