> Well, this is not a good news. Indeed, it's not a
> good idea to overload servers, but what are my poor
> 4 KB/S regarding 20 Mb/S ADSL today ?
What did you set your connections to?  It's an "enforced" restriction in
HTTrack because too many connections can cause overloading.  However those 4
connections are still going to try to use your available bandwidth.

That said, see:
<http://forum.httrack.com/readmsg/12373/index.html?pid=12371>