Answers: Yes you can install Microsoft bureau 2000, department xp, organization 2003, department 2007. You can even download the openoffice carton:
http://www.openoffice.org/
Open Office is a suite carton that have powerpoint, spreadsheet, word processor, etc. It's almost approaching Microsoft Office. Of course unambiguous department does not hold the fancy interface that Microsoft bureau have, but hey it does the undertaking. And guess what, IT'S 100% FREE.
yes you install every software which allow you to install in vista
even you run in vista word 2000