> I have tried the following parameters:
> -N "web/%t/%n.%t" -%q0

> folder, and I wanted the same but keep the html
> outside web/index.html (for example)

Drop the -%q0. It has nothing to do with what you want.
Why are you using the custom format when you want
-N4 HTML in web/, images/other in web/xxx, where xxx is the file extension
<http://www.httrack.com/html/fcguide.html>