Drupal 6 : List nodes in alphabetical order

I want the taxonomy/term/tid pages list nodes in alphabetical order in drupal 6. By default, nodes are listed in order of the created time. I knew I can achieve my goal with Views module, but it was a small project, so I tried a duty ( and simple) way. Here is how:

open modules/taxonomy/taxonomy.module file, and search for

function taxonomy_select_nodes($tids = array(), $operator = 'or', $depth = 0, $pager = TRUE, $order = 'n.sticky DESC, n.created DESC')

change the code to:

function taxonomy_select_nodes($tids = array(), $operator = 'or', $depth = 0, $pager = TRUE, $order = 'n.sticky DESC, n.title')