Your asking for something which is not legal my friend... If your a student you can get a legal copy of ms office 2007 / 2010 from the DreamSpark program of Microsoft...
See the announcement which is at the top of each forum: "Allowed or Not - [Quick Reference]" http://www.go4expert.com/announcement.php?f=43 It states: Serials / Keys Allowed: none Not allowed: No buying, selling, trading or giving away for free, serials or keys
That is a good suggestion. The Open Office equıvalent of Powerpoint is called Impress. Presentations created can be saved in powerpoint file format.