BUT,it says I need to have Microsoft Outlook 2007 on my computer. How do I do this?
The free trial includes Outlook 2007, so I am not sure why you would get this message.
Try downloading from the Microsoft site, and be sure to follow all the links and installation instructions.
Once your Microsoft 2007 trial has expired, you cannot download it again without purchasing it. However, you can download Microsoft Office Beta 2010 and it will not expire until October 2010. Hope this is helpful! Cheers, Cassandra MSFT Office Outreach Team