Recently I have tried to update a mirror of a website 
and found that the mirror basically tried to start 
from scratch because the folders on the website had 
been restructured even though the contents hadn't 
changed.

For example, the original site contents were as 
follows:

www.somewebsite.com/oldfolder/xx/yy.jpg

And it changes to :

www.somewebsite.com/newfolder/xx/yy.jpg

As I said, the material has not changed, but the 
folder name at the highest level has changed for some 
strange reason.  What happens is that Httrack 
interprets this as all new material and tries to 
mirror it (and the old folders become inaccessible).  
Since the website is more than 100 MB, it is quite 
awkward for it to do this and is a waste of the 
bandwidth.  

The only reason that I am updating this mirror is to 
catch the portions that change from day to day, not to 
remirror the entire website because of the folder 
restructuring.

Any suggestions anyone?
Bill Carter