seed shell for CakePHP 2.x

seed.php

<?php
class AppSeed {

	public $users = array(
		array(
			'id' => 1,
			'username' => 'testuser1',
			'message' => 'Lorem ipsum dolor sit amet',
		),
		array(
			'id' => 2,
			'username' => 'testuser2',
			'message' => 'Lorem ipsum dolor sit amet',
		),
	);
}

SeedShell.php

<?php
App::uses('File', 'Utility');
App::uses('Folder', 'Utility');

class SeedShell extends AppShell {
	public function startup() {
		$this->_welcome();
		$this->out('Cake Seed Shell');
		$this->hr();

		if (empty($this->params['name'])) {
			$this->params['name'] = 'app';
		}

		if (empty($this->params['file'])) {
			$this->params['file'] = 'seed.php';
		}
		if (strpos($this->params['file'], '.php') === false) {
			$this->params['file'] .= '.php';
		}

		if (empty($this->params['path'])) {
			$this->params['path'] = APP . 'Config';
		}

		if (empty($this->params['connection'])) {
			$this->params['connection'] = 'default';
		}

		$file = $this->params['file'];
		$path = $this->params['path'];
		$name = Inflector::camelize($this->params['name']);
		$this->connection = $this->params['connection'];

		if(file_exists($path . DS . $file) 
		&& is_file($path . DS . $file)) {
			require_once $path . DS . $file;
		} else {
			$this->out('seed file is not exist.');
			exit();
		}

		$class = $name . 'Seed';
		if(class_exists($class)) {
			$this->seed = new $class();
		}
	}

	public function create() {
		$models = App::objects('Model');

		if(is_array($models)) {
			foreach($models as $model) {
				if ($model == 'AppModel') {
					continue;
				}

				try {
					$Object = ClassRegistry::init(array('class' => $model, 'ds' => $this->connection));
				} catch (CakeException $e) {
					continue;
				}

				if (is_object($Object) && $Object->useTable !== false) {
					$table = $Object->table;
					if(isset($this->seed->$table)) {
						$rows = count($this->seed->$table);
						$this->out($rows . ' rows added to ' . $table);
						$Object->saveMany($this->seed->$table);
					}
				}
			}
		}
	}

	public function delete() {
		$models = App::objects('Model');

		if(is_array($models)) {
			foreach($models as $model) {
				if ($model == 'AppModel') {
					continue;
				}

				try {
					$Object = ClassRegistry::init(array('class' => $model, 'ds' => $this->connection));
				} catch (CakeException $e) {
					continue;
				}

				if (is_object($Object) && $Object->useTable !== false) {
					$this->out('deleted all data in ' . $Object->table);
					$Object->deleteAll('1 = 1');
				}
			}
		}
	}

	public function getOptionParser() {
		$connection = array(
			'short' => 'c',
			'help' => __d('cake_console', 'Set the db config to use.'),
			'default' => 'default'
		);
		$path = array(
			'help' => __d('cake_console', 'Path to read seed.php'),
			'default' => APP . 'Config'
		);
		$file = array(
			'help' => __d('cake_console', 'File name to read seeds.'),
			'default' => 'seed.php'
		);
		$name = array(
			'help' => __d('cake_console', 'Classname to use.')
		);

		$parser = parent::getOptionParser();
		$parser->description(
			__d('cake_console', 'The Seed Shell adds seed data to database tables from a seed file.')
		)->addSubcommand('create', array(
			'help' => __d('cake_console', 'add seed data to tables.'),
			'parser' => array(
				'options' => compact('path', 'file', 'name', 'connection'),
				'args' => array(
					/*
					'name' => array(
						'help' => __d('cake_console', 'Name of schema to use.')
					),
					'table' => array(
						'help' => __d('cake_console', 'Only create the specified table.')
					)
					 */
				)
			)
		))->addSubcommand('delete', array(
			'help' => __d('cake_console', 'delete all data from tables'),
			'parser' => array(
				'options' => compact('connection'),
				'args' => array(
				)
			)
		));
		return $parser;
	}
}

this looks great - where do you install it and how do you invoke it?