D6: Alter cck multiple value field. Not really sure this is the good way.

gistfile1.aw

<?php 


/**
 * Implementation of hook_form_alter().
 */
function mymodule_form_alter(&$form, $form_state, $form_id) {

  // Appelé la 1ere fois, sur node/add/mycontenttype
  if($form_id == 'mycontenttype_node_form') {

    foreach($form['field_my_field'] as $k => $v) {
      if (is_numeric($k)) {
        $form['field_my_field'][$k]['#autocomplete_path'] = 'my-autocomplete-path';
      }
    }
    
  }
  
  // appelé a chaque "Add another item" sur field_my_field
  elseif ($form_id == 'content_add_more_js' && isset($form['field_my_field'])) {
    
    foreach($form['field_my_field'] as $k => $v) {
      if (is_numeric($k)) {
        $form['field_my_field'][$k]['#autocomplete_path'] = 'my-autocomplete-path';
      }
    }
    
  }
  
  

} // mymodule_form_alter