Look in http.conf, there are parameters you can set for the Apache::MP3 package that allow you to set what the sort fields are, and also what fields are displayed.
Make a custom template from a copy of /etc/e-smith/templates/etc/httpd/conf/httpd.conf and edit it so it outputs the flags you want. See the docs in /usr/lib/perl5/site_perl/5.6.0/Apache/MP3/Sorted.pm for the details of what parameters and values are available.
--Robin