I am trying to do the following with httrack: 
 
I want to capture a full Web tree at one point in time, 
but then subsequently just update different 
sub-directories of the full tree. 
 
If I get the full tree, links in all sub-directories are 
chnaged to relative links. 
 
However I find that if I get the sub-directory only, links  
to top-level items (outside the sub-directory) are not 
rewritten as relative links - they remain absolute. 
 
Any ideas?