> In order to do this, I'd like to know which character
> conversions are made by HTTrack to name the file on disk
> and which parameters I need to use to force HTTrack to
> not modify the HTML code. 
> For example, using --mirror -%F "" -N0  the URL 
> www.foo.it/index.php?e=13
> is named on disk as
> www.foo.it/index8f00.html

--mirror -%F "" -N "%r/%h%p/%n.%t" -u0

(u0 == never test document type, and leave as .php)