Office Migration Planning Manager (OMPM)

... 

The Office Migration Planning Manager (OMPM) is a collection of tools that enables you to prepare for migration to the Microsoft 2007 Office system. OMPM checks for, and reports on, file properties to help you analyze your environment. You can download OMPM from 2007 Microsoft Office System Migration Guidance: Microsoft Office Migration Planning Manager

For the most part, documents created in Office 2003 and earlier open and behave the same way in the 2007 Office release. However, there might be instances where files require manual intervention or analysis to ensure consistent behavior. For example, a custom solution built in Microsoft Excel 2003 might require modification because it relies on legacy Office features that are no longer supported in Excel 2007.

...

</steve>