Till the plugin installer is done some manual work is needed.

download and put the contents in /pluings

run the following sql

CREATE TABLE IF NOT EXISTS `gallery_images` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `image` varchar(255) NOT NULL,
  `title` varchar(255) NOT NULL,
  `slug` varchar(100) NOT NULL,
  `description` text NOT NULL,
  `keywords` varchar(255) NOT NULL,
  `category_id` mediumint(9) NOT NULL DEFAULT '0',
  `views` int(11) NOT NULL DEFAULT '0',
  `active` tinyint(1) NOT NULL,
  `created` datetime DEFAULT NULL,
  `modified` datetime DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8;

it uses the built in categories, so all you need to do is start adding images.

the gallery plugin uses the jQuery lightbox plugin "pirobox" available at
http://www.pirolab.it/pirobox/ and was done by
Diego Valobra (http://www.pirolab.it),(http://www.diegovalobra.com)

You can change the look of the lightbox by adjusting the config options in the
config.php file. At the moment, there are 5 different styles to choose from