Marked as final documents come up with an "Edit anyway" button in Word 2010 but we just couldn't figure out how to do the same thing in Word 2007. Yay, there is a way, it's just buried way, way down in that damned 2007 "Microsoft Office Button" menu. Go to the M$Office button menu, find the choice for "Prepare", and click on "Mark As Final" to toggle it off.
Here's the link for how to do it in M$Word 2007:
http://office.microsoft.com/en-us/word-help/prevent-changes-to-a-final-version-of-a-document-HA010132569.aspx
Here's some links on how to find the option in M$Word 2010 (completely differently):
http://office.microsoft.com/en-us/word-help/prevent-changes-to-a-final-version-of-a-document-HA010132569.aspx
http://grok.lsu.edu/article.aspx?articleid=14353