Now plugin model can be specify in 'with' property of hasAndBelongsTo…

…Many association.

cake/libs/model/model.php

@@ -2051,7 +2051,7 @@ protected function _deleteDependent($id, $cascade) {
  */
 	protected function _deleteLinks($id) {
 		foreach ($this->hasAndBelongsToMany as $assoc => $data) {
-			$joinModel = $data['with'];
+			list($plugin, $joinModel) = pluginSplit($data['with']);
 			$records = $this->{$joinModel}->find('all', array(
 				'conditions' => array_merge(array($this->{$joinModel}->escapeField($data['foreignKey']) => $id)),
 				'fields' => $this->{$joinModel}->primaryKey,
@@ -3043,6 +3043,7 @@ public function getAssociated($type = null) {
  */
 	public function joinModel($assoc, $keys = array()) {
 		if (is_string($assoc)) {
+			list(, $assoc) = pluginSplit($assoc);
 			return array($assoc, array_keys($this->{$assoc}->schema()));
 		} elseif (is_array($assoc)) {
 			$with = key($assoc);