huenerjuwelier, you need to copy and paste the SQL code and run it from your admin, tools, install SQL patches. If you tried to upload the whole text file you would get the error message. You need to copy and paste the code, just this part into your SQL in admin..

INSERT INTO configuration_group VALUES (NULL, 'Zen Lightbox', 'Configure Zen Lightbox options', '1', '1');
UPDATE configuration_group SET sort_order = last_insert_id() WHERE configuration_group_id = last_insert_id();

SET @t4=0;
SELECT (@t4:=configuration_group_id) as t4
FROM configuration_group
WHERE configuration_group_title= 'Zen Lightbox';

INSERT INTO configuration (configuration_id, configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, last_modified, date_added, use_function, set_function) VALUES (NULL, 'Enable Zen Lightbox?', 'ZEN_LIGHTBOX_STATUS', 'true', '<br />If true, all product images on the following pages will be displayed within a lightbox:<br /><br />- document_general_info<br />- document_product_info<br />- product_free_shipping_info<br />- product_info<br />- product_music_info<br />- product_reviews<br />- product_reviews_info<br />- product_reviews_write<br /><br />Please note: To completely remove Zen Lightbox you will need to manually delete the installation files.<br /><br /><b>Default: true</b>', @t4, 1, NOW(), NOW(), NULL, 'zen_cfg_select_option(array(''true'', ''false''), '),
(NULL, 'Overlay Opacity', 'ZEN_LIGHTBOX_OVERLAY_OPACITY', '0.8', '<br />Controls the transparency of the overlay.<br /><br /><b>Default: 0.8</b>', @t4, 2, NOW(), NOW(), NULL, 'zen_cfg_select_option(array(''0'', ''0.1'', ''0.2'', ''0.3'', ''0.4'', ''0.5'', ''0.6'', ''0.7'', ''0.8'', ''0.9'', ''1''), '),
(NULL, 'Overlay Fade Duration', 'ZEN_LIGHTBOX_OVERLAY_DURATION', '0.2', '<br />Controls the fade duration of the overlay.<br /><br /><b>Default: 0.2</b>', @t4, 3, NOW(), NOW(), NULL, 'zen_cfg_select_option(array(''0'', ''0.1'', ''0.2'', ''0.3'', ''0.4'', ''0.5'', ''0.6'', ''0.7'', ''0.8'', ''0.9'', ''1''), '),
(NULL, 'Enable Resize Animations?', 'ZEN_LIGHTBOX_RESIZE_ANIMATIONS', 'true', '<br />If true, the lightbox will be animated as it appears on the screen.<br /><br /><b>Default: true</b>', @t4, 4, NOW(), NOW(), NULL, 'zen_cfg_select_option(array(''true'', ''false''), '),
(NULL, 'Resize Speed', 'ZEN_LIGHTBOX_RESIZE_SPEED', '7', '<br />Controls the speed of the image resizing.<br /><br />(1 = slowest and 10 = fastest)<br /><br /><b>Default: 7', @t4, 5, NOW(), NOW(), NULL, 'zen_cfg_select_option(array(''1'', ''2'', ''3'', ''4'', ''5'', ''6'', ''7'', ''8'', ''9'', ''10''), '),
(NULL, 'Border Size', 'ZEN_LIGHTBOX_BORDER_SIZE', '10', '<br />If you adjust the padding in the CSS file, you will need to update this variable.<br /><br />Please note: This value is measured in pixels.<br /><br /><b>Default: 10</b><br />', @t4, 6, NOW(), NOW(), NULL, NULL),
(NULL, 'Close on Overlay Click?', 'ZEN_LIGHTBOX_CLOSE_OVERLAY', 'false', '<br />If true, the lightbox will close when the overlay is clicked.<br /><br /><b>Default: false</b>', @t4, 7, NOW(), NOW(), NULL, 'zen_cfg_select_option(array(''true'', ''false''), '),
(NULL, 'Hide Flash Objects?', 'ZEN_LIGHTBOX_HIDE_FLASH', 'true', '<br />If true, all Flash objects will be hidden when the lightbox is displayed.<br /><br /><b>Default: true</b>', @t4, 8, NOW(), NOW(), NULL, 'zen_cfg_select_option(array(''true'', ''false''), '),
(NULL, 'DIV Class to Hide', 'ZEN_LIGHTBOX_HIDE_ME', 'zenLightboxHideMe', '<br />Any content wrapped in a DIV tag with this class will be hidden when the lightbox is displayed.<br /><br /><b>Default: zenLightboxHideMe</b><br />', @t4, 9, NOW(), NOW(), NULL, NULL);
Hope this will help.