Open/view Office 2007 Word/Excel file without Office 2007

How to obtain the latest Microsoft Excel Viewer

How to view Word 2007 and Excel 2007 files by using Word Viewer 2003 and Excel Viewer 2003
http://support.microsoft.com/kb/925180

Important notes:
You cannot click Open on the File menu to open an Excel 2007 file in the Excel 2003 Viewer.

The Compatibility Pack enables you to open and view Word 2007 and Excel 2007 documents by using the Word Viewer 2003 and the Excel Viewer 2003.


How to open new file formats in earlier versions of Microsoft Office says:
Before you install the Office Compatibility Pack, make sure that your computer has all the necessary updates. To make sure that you are ready to install the Compatibility Pack, review the following information for your version of Office.

For Office 2003, Office 2003 SP3 must be installed

www.oooninja.com/2008/02/office-compatibility-pack-review.html says:
Don't let the name "Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 file format" fool you. You do not need Microsoft Office, so it works great with OpenOffice.org, Google Docs, Abiword, WordPerfect, and Microsoft Office 2003.