> Firefox Update Scanner does only check one single
> page, not a complete SITE for changes. But, I want
> to check a whole site

I miss read when I saw:
> I could periodically check a SINGLE
> page for changes

See Re: Multiple Versions (Dates) of the Same Website - HTTrack Website Copier
Forum
<http://forum.httrack.com/readmsg/23370/23330/index.html>

You'll have to xcopy the original mirror, then update, then recursively run
the html files through fc or diff to find out what has changed.