> This site (www.peternorth.com), authenticates as follows
> is it possible with HTTrack to authenticate and downnload 
> this site?
If the authentication is a regular, HTTP authentication, 
try:
<http://username:password@www.peternorth.com>

(try to enter the same 
<http://username:password@www.peternorth.com> in your 
browser - argh NOT Internet Explorer, as it is unable to 
handle username/password auth anymore due to security bugs)