The archive contains 2 different themes. One with a large title bar, and the other with a smaller one :) You can also replace the rounded bottom corners by some square ones (See "other elements" folder).
This theme requires the dekorator windeco you can find here http://www.kde-look.org/content/show.php?content=31447 but I think anyway it should available in the repositories (like in ubuntu).
1. Open kcontrol or whatever can let you change your windeco.
2. Appearance & themes > window decoration then choose dekorator in the bar.
3 go to the "Themes" tab and then "install new theme" and browse to the archive
4. Just apply then and enjoy ;)
5 Tell me if you see anything strange or bugs