[Zope-CMF] database modification time vs. content modification time

[John Waycott]

I have a CMF/Plone Intranet site to which I've loaded scores of old 
reference documents. The trouble is, the last modified date shown for 
each document is that date the documents were uploaded to the site, not 
the date that the documents themselves were last modified. Also, the 
modified date is changed if I just change the title or description, 
which is not what I want; I need to change that behavior so that the 
modified date is based on the date the content was modified.

Is there a way to change the date backwards to the original date the 
files were last modified, and change it only if the body of the content 
is modified?

--
John Waycott