Comunque il mio sorcio attuale in Debian-4.0 :

# deb cdrom:[Debian GNU/Linux 4.0 r0 _Etch_ - Official i386 xfce-CD Binary-1 20070407-12:12]/ etch contrib main

# deb cdrom:[Debian GNU/Linux 4.0 r0 _Etch_ - Official i386 xfce-CD Binary-1 20070407-12:12]/ etch contrib main

deb http://ftp.it.debian.org/debian/ etch main contrib non-free

deb http://ftp.it.debian.org/debian/ lenny main contrib non-free
# deb http://ftp.it.debian.org/debian/ sid main contrib non-free
deb http://ftp.it.debian.org/debian/ experimental main contrib non-free

deb http://security.debian.org/ etch/updates main contrib non-free
# deb-src http://security.debian.org/ etch/updates main contrib non-free
deb http://www.debian-multimedia.org/ experimental main
deb http://www.debian-multimedia.org/ testing main
deb http://www.debian-multimedia.org/ sid main
#deb http://archive.technalign.com/ explorer main restricted universe multiverse

E funziona splendidamente