> 1. i can't run webhttrack as a normal user. i must be root
> to run it.

No - you should be able to run it as a regular user! What 
happends when launching webhttrack ?
> 2. i can't -i don't know- how to download only a 
directory.
> i wanna download the dir
> <http://philippe.lourdez.free.fr/wallpaper/images/debian/> ,

Use scan rules:
-philippe.lourdez.free.fr* 
+philippe.lourdez.free.fr/wallpaper/images/debian/*[file]

If you wan tot download the complete site, just use:
+philippe.lourdez.free.fr*