Recently received Office 2008 for mac. I have student/teacher edition (2008) already installed (on my macbook pro running leopard) This is the MEDIA edition with Expression Media. I am trying to figure out if I should install it (is it any different from student/teacher, which was way less costly), and if so, how do I do so with student/teacher already installed? Do I delete that version after installing the new one...BEFORE installing it, or just SELL the new unopened one because I don't 'need' it. ?? thanks 