Open attached files from e-mails
If all you are wanting to do is read or print the email attachments, and they have been written using Word 2003 or Excel 2003, you can go to Microsoft.com and download Word Viewer 2003 and Excel Viewer 2003. These two viewers will allow you to read or print either Word or Excel documents as long as the original composer used Word 2003 or Excel 2003, or some earlier version such as 2000 or XP. To the best of my knowledge, Microsoft has not released a viewer for any of its 2007 programs yet.
However, if you are wanting to compose new documents, or edit the attached documents, you will need to have a copy of the program in question.
There is also one other possibility. You can go to openoffice.org and download a free copy of Open Office. I am not sure if the Open Office Suite is 100% compatible with the Microsoft Office products, but it should be close enough to get you by.
One other thing, if you are receiving .pdf documents, you can go to Adobe.com and download the latest version of Adobe Reader. This is also a free download and will allow you to open, view and print the .pdf documents but, again, in order to edit them you will need a copy of Adobe Acrobat (not free) or some other compatible program such as Open Office (again there may be some slight compatibility issues to deal with).
Hope that helps - Graye