This both is feedback to the Drupal community of a method that I found, as well as open for further perfection:

ONLY show modules/themes/libraries/plugins file contents with .htaccess - http://drupal.org/node/30334#comment-3511962

As the page might not be noted, I guessed it could help adding a forum topic to it.

For discussion this forum topic serves more, but for adding good info; the place is there..!