Hi, thanks for your help.

I had a look at the link you gave and checked that I did indeed have a prefix defined (zen_) as per the link.
So I made the changes suggested and applied the patch through the Admin which partly worked. However I got 4 errors and the following text:

PHP Code:
Query Results:
/** * Zen Lightbox * * @author Alex Clarke ([email protected]) * @copyright Copyright 2003-2005 Zen Cart Development Team * @copyright Portions Copyright 2003 osCommerce * @license http://www.zen-cart.com/license/2_0.txt GNU Public License V2.0 * @version $Id: install.sql 2008-12-17 aclarke $ */ INSERT INTO zen_configuration_group VALUES (NULL'Zen Lightbox''Configure Zen Lightbox settings''0''1');
UPDATE zen_configuration_group SET sort_order LAST_INSERT_ID() WHERE configuration_group_id LAST_INSERT_ID();
SELECT @cgi := configuration_group_id FROM zen_configuration_group WHERE configuration_group_title 'Zen Lightbox';
INSERT INTO zen_configuration (configuration_idconfiguration_titleconfiguration_keyconfiguration_valueconfiguration_descriptionconfiguration_group_idsort_orderlast_modifieddate_addeduse_functionset_functionVALUES (NULL'Zen Lightbox''ZEN_LIGHTBOX_STATUS''true''
If true, all product images on the following pages will be displayed within a lightbox:

- document_general_info
- document_product_info
- page (EZ-Pages)
- product_free_shipping_info
- product_info
- product_music_info
- product_reviews
- product_reviews_info
- product_reviews_write

Default: true'
, @cgi100NOW(), NOW(), NULL'zen_cfg_select_option(array(''true'', ''false''), '), (NULL'Overlay Opacity''ZEN_LIGHTBOX_OVERLAY_OPACITY''0.8''
Controls the transparency of the overlay.

Default: 0.8'
, @cgi101NOW(), 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_FADE_DURATION''400''
Controls the fade duration of the overlay.

Note: This value is measured in milliseconds.

Default: 400
'
, @cgi102NOW(), NOW(), NULLNULL), (NULL'Resize Duration''ZEN_LIGHTBOX_RESIZE_DURATION''400''
Controls the speed of the image resizing.

Note: This value is measured in milliseconds.

Default: 400
'
, @cgi103NOW(), NOW(), NULLNULL), (NULL'Resize Transition''ZEN_LIGHTBOX_RESIZE_TRANSITION''false''
Allows for custom control over the transition effect used to animate the lightbox.

Default: false
'
, @cgi104NOW(), NOW(), NULLNULL), (NULL'Initial Width''ZEN_LIGHTBOX_INITIAL_WIDTH''250''
If Enable Resize Animations is set to true, the lightbox will resize its width from this value to the current image width, when first displayed.

Note: This value is measured in pixels.

Default: 250
'
, @cgi105NOW(), NOW(), NULLNULL), (NULL'Initial Height''ZEN_LIGHTBOX_INITIAL_HEIGHT''250''
If Enable Resize Animations is set to true, the lightbox will resize its height from this value to the current image height, when first displayed.

Note: This value is measured in pixels.

Default: 250
'
, @cgi106NOW(), NOW(), NULLNULL), (NULL'Image Fade Duration''ZEN_LIGHTBOX_IMAGE_FADE_DURATION''400''
Controls the fade duration of images.

Note: This value is measured in milliseconds.

Default: 400
'
, @cgi107NOW(), NOW(), NULLNULL), (NULL'Caption Animation Duration''ZEN_LIGHTBOX_CAPTION_ANIMATION_DURATION''400''
Controls the animation duration of the caption.

Note: This value is measured in milliseconds.

Default: 400
'
, @cgi108NOW(), NOW(), NULLNULL), (NULL'Display Image Counter''ZEN_LIGHTBOX_COUNTER''true''
If true, the image counter will be displayed (below the caption of each image) within the lightbox.

Default: true'
, @cgi109NOW(), NOW(), NULL'zen_cfg_select_option(array(''true'', ''false''),'), (NULL'Close on Image Click''ZEN_LIGHTBOX_CLOSE_IMAGE''false''
If true, the lightbox will close when the image being displaying is clicked.

Default: false'
, @cgi110NOW(), NOW(), NULL'zen_cfg_select_option(array(''true'', ''false''), '), (NULL'Close on Overlay Click''ZEN_LIGHTBOX_CLOSE_OVERLAY''false''
If true, the lightbox will close when the overlay is clicked.

Default: false'
, @cgi111NOW(), NOW(), NULL'zen_cfg_select_option(array(''true'', ''false''), '), (NULL'Always show Prev / Next''ZEN_LIGHTBOX_PREV_NEXT''false''
If true, the lightbox will always show Previous & Next buttons when using additional images. NOTE: This setting will be overwritten automatically when Close on Image Click is set to TRUE.

Default: false'
, @cgi112NOW(), NOW(), NULL'zen_cfg_select_option(array(''true'', ''false''), '), (NULL'Keyboard Navigation''ZEN_LIGHTBOX_KEYBOARD_NAVIGATION''true''
If true, keyboard inputs will also be used to control the lightbox.

Default: true'
, @cgi200NOW(), NOW(), NULL'zen_cfg_select_option(array(''true'', ''false''), '), (NULL'Close Lightbox''ZEN_LIGHTBOX_ESCAPE_KEYS''27,88,67''
The lightbox will close when any of these keys are pressed.

Note: Only ASCII decimal values should be entered and separated with a comma (if listing multiple values).

Default: 27,88,67
'
, @cgi201NOW(), NOW(), NULLNULL), (NULL'Previous Image''ZEN_LIGHTBOX_PREVIOUS_KEYS''37,80''
The lightbox will display the previous image (if available) when any of these keys are pressed.

Note: Only ASCII decimal values should be entered and separated with a comma (if listing multiple values).

Default: 37,80
'
, @cgi202NOW(), NOW(), NULLNULL), (NULL'Next Image''ZEN_LIGHTBOX_NEXT_KEYS''39,78''
The lightbox will display the next image (if available) when any of these keys are pressed.

Note: Only ASCII decimal values should be entered and separated with a comma (if listing multiple values).

Default: 39,78
'
, @cgi203NOW(), NOW(), NULLNULL), (NULL'Gallery Mode''ZEN_LIGHTBOX_GALLERY_MODE''true''
If true, the lightbox will allow additional images to quickly be displayed using previous and next buttons.

Default: true'
, @cgi300NOW(), NOW(), NULL'zen_cfg_select_option(array(''true'', ''false''),'), (NULL'Include Main Image in Gallery''ZEN_LIGHTBOX_GALLERY_MAIN_IMAGE''true''
If true, the main product image will be included in the lightbox gallery.

Default: true'
, @cgi301NOW(), NOW(), NULL'zen_cfg_select_option(array(''true'', ''false''),'), (NULL'EZ-Pages Support''ZEN_LIGHTBOX_EZPAGES''true''
If true, the lightbox effect will be used for linked images on all EZ-Pages.

Default: true'
, @cgi400NOW(), NOW(), NULL'zen_cfg_select_option(array(''true'', ''false''),'), (NULL'File Types''ZEN_LIGHTBOX_FILE_TYPES''jpg,png,gif''
On EZ-Pages, the lightbox effect will be applied to all images with one of the following file types.

Default: jpg,png,gif
'
, @cgi401NOW(), NOW(), NULLNULL); 
The errors I got at the top of the csreen were:

ERROR: Cannot execute because table zen_configuration_group does not exist. CHECK PREFIXES!
ERROR: Cannot execute because table zen_configuration_group does not exist. CHECK PREFIXES!
ERROR: Cannot execute because table zen_configuration_group does not exist. CHECK PREFIXES!
ERROR: Cannot execute because table zen_configuration does not exist. CHECK PREFIXES!

I also now have 4 entries for Zen Lightbox on the Admin configuration menu! None of which appear to do anything!!!

This is now starting to get messy and I am worried about breaking something. I have backups so can recover if required but would rather not have to if it can be avoided. Any further help much appreciated.