> When I use HTTrack (linux), I can't use ASP link
> (maybe because there is an & in the URL) of my local
> pages.

"Local ASP page" ?! That is, asp scripts on the local 
(file://) filesystem? Or pages spidered locally?On Unix/Linux systems, you may
use the '' (quotes) such as:
httrack 'www.foo.com?bar&barbar' +*.gif +*.png '+*/*?bar=1'

> Some sites require authentication several times or at
> accessing every link.Winhttrack does not support 
> propagation of userid:pass@host for every link (for
> the moment I should add the userid:pass@ to each link
> after).

Err, darn, this should be - authenticating www.foo.com/bar/ 
should let the authentication scheme be propagated for all 
lower structures (www.foo.com/bar/page2.shtml, 
www.foo.com/bar/subdir/ and so on..)