Recently lot of my friends are suffering from this dilemma that how to open Microsoft Office 2007 files (with formats like .xlsx, .docx, .pptx etc) and we use to convert files from Microsoft 2007 formats to Microsoft Older Versions, and this way of doing was little boring and time consuming, So i searched for a way to open, edit, modify and save Microsoft 2007 in Microsoft Office 2003, 2000.
See how simple now it is..
Just download this below linked Compatibility Pack from Microsoft...