To open Microsoft Office Word 2007 .docx or .docm files with Microsoft Office Word 2003, Word 2002, or Word 2000, you need to install the Microsoft Office Compatibility Pack for 2007 Office Word, Excel and PowerPoint File Formats and any necessary Office updates. By using the Compatibility Pack for the 2007 Office system, you can open, edit some items, and save Office Word 2007 documents in previous versions of Word.
I know that it’s idiotic to have to install a program to open Microsoft Word documents, even if you already have Microsoft Word, but that’s Microsoft. (upgrade. feed the beast.)
