> I think Httrack can not follow asp or php files. But it 
> spends too much time trying to examine them.

Of course it can, see related talks on this forum - but it 
has to scan then to 'know' their type. Use 
the 'Options'/'MIME Types' pannel to enhance this: choose 
something like "php,asp" <-> "text/html" - the engine won't 
scan these files anymore, and will consider them as pure 
html.