How to Save Word 2007 file in Word 2003

Many time we send ms office files through Email or USB but some time other user complain that, it is not working or not open in my computer, the actual problem is that, you use new version of ms office like 2010 or 2007 and other user use old version like ms office 2003.
In this video tutorial you learn how to save ms office 2010 or ms office 2007 files in old version office like ms office 2003.
So watch this video carefully.