> When I download a site Httrack change the absolute url 
into
> relative only to the address of the directory I've 
downloaded.
> I'd like to have a mirrored site with ALL relative url 
even
> for the directories i've not downloaded. So, for example, 
if
> a friend gave to me a mirrored site without an interesting
> section saved, I can download new pages without the need 
of
> httrack cache.

This isn't possible ; mainly because httrack has to "know" 
all links being downloaded to name problematic URLs 
(example: collisions, or naming convention problems with 
URLs containing special characters)