Note about the mod_musicindex package data :

Starting with version 0.999, the package data (image and css files) is not
installed to the /var/www/musicindex directory, but /usr/share/mod_musicindex
instead, with an Apache Alias pointing /musicindex to it. This directory is not
intended to receive user files. If you want to use your own defined css and/or
icons, have them in your own directory (for instance, in /home or /var) and
change the alias. If you modify the icons and the default as distributed in
the package in /usr/share/mod_musicindex, they will be overwritten during the
next upgrade.