HI I am planning on buying a macbook this week and need to know if i can take Microsoft Office 2007 for windows off my friend's external hardrive and put it onto my mac. If this is not ok, is the Microsoft office for Mac for $150 my best bet at saving money and getting office. ALso when i transfer all my excel and word files will they easily work on office for mac? If any of these questions could be answered it would be greatly appreciated! Thnx!