Drupal: Submitted by !username on date/time

I am using Drupal 6.12 with Bluemarine as my Default theme. Can someone tell me how can I modify the node pages where: " Submitted by !username on date/time " reflects !username as http://localhost/peoplefind/view-user-profile?empid=$uid

I believe it has something to do with:
modules\node

node.module

/**
 * Format the "Submitted by username on date/time" for each node
 *
 * @ingroup themeable
 */
function theme_node_submitted($node) {
  return t('Submitted by !username on @datetime',
    array(
      '!username' => theme('username', $node),
      '@datetime' => format_date($node->created),
    ));
}