package My::DBI::Config;
use base qw/Class::DBI/;
My::DBI::Config->set_db { ...

##</code><code>##

package My::DBI;
use base qw(My::DBI::Config);

##</code><code>##

     Give it a database connection
           Class::DBI needs to know how to access the database.  It does this
           through a DBI connection which you set up by calling the set_db()
           method.

                   Music::DBI->set_db('Main', 'dbi:mysql:dbname', 'user', 'password');

           By setting the connection up in your application base class all the
           table classes that inherit from it will share the same connection.