DOCBOOK-APPS: Monospage fonts for verbatim-style

Hi all,

I cannot manage to have correctly aligned text for my <screen>
quotations...

I have tried many fonts (under Linux) like:
(define %mono-font-family%  "Computer-Modern-Typewriter")

But it doesn't work :-(

Some clue?

Thanks, Camille.

-- 
Get your head off the keyboard and look behind the screen.