I've just tried to do an uninstall and get the following. But I'll PM you the site details.

I tried unistalling and I get more message stack errors.
Makes me think there is some permission or cofig problem because the installer doesn't appear to be working...
Code:
 ROLLBACK : /hsphere/local/home/wctest/test-waycool.com.au/backoffice/includes/modules/category_product_listing.php was NOT rolled back.  
 ROLLBACK : /hsphere/local/home/wctest/test-waycool.com.au/includes/modules/pages/popup_image/header_php.php was NOT rolled back.  
 ROLLBACK : /hsphere/local/home/wctest/test-waycool.com.au/includes/modules/pages/popup_image_additional/header_php.php was NOT rolled back.  
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/bmz_cache/.htaccess 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/includes/classes/bmz_gif_info.class.php 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/includes/classes/bmz_image_handler.class.php 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/includes/extra_configures/bmz_image_handler_conf.php 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/includes/extra_configures/bmz_io_conf.php 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/includes/functions/extra_functions/functions_bmz_image_handler.php 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/includes/functions/extra_functions/functions_bmz_io.php 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/backoffice/image_handler.php 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/backoffice/includes/ih_manager.php 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/backoffice/includes/init_includes/init_image_handler.php 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/backoffice/images/checkpattern.gif 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/backoffice/images/icon_image_handler.gif 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/backoffice/images/ih-test.gif 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/backoffice/images/ih-test.jpg 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/backoffice/images/ih-test.png 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/backoffice/includes/extra_configures/bmz_image_handler_conf.php 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/backoffice/includes/extra_configures/bmz_io_conf.php 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/backoffice/includes/extra_datafiles/image_handler.php 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/backoffice/includes/functions/extra_functions/functions_bmz_image_handler.php 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/backoffice/includes/functions/extra_functions/functions_bmz_io.php 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/backoffice/includes/languages/english/extra_definitions/bmz_image_handler.php 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/backoffice/includes/languages/english/extra_definitions/bmz_language_admin.php 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/backoffice/includes/modules/category_product_listing.DEFAULT.php.bak 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/includes/modules/pages/popup_image/header_php.DEFAULT.php.bak 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/includes/modules/pages/popup_image_additional/header_php.DEFAULT.php.bak 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/includes/modules/IH_INSTALL/additional_images.php 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/includes/modules/IH_INSTALL/main_product_image.php 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/includes/templates/IH_INSTALL/css/style_imagehover.css 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/includes/templates/IH_INSTALL/css/style_imagehover.css 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/includes/templates/IH_INSTALL/jscript/jscript_imagehover.js 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/includes/templates/IH_INSTALL/jscript/jscript_imagehover.js 
 not deleted - /hsphere/local/home/wctest/test-waycool.com.au/includes/templates/IH_INSTALL/popup_image_additional/tpl_main_page.php 
 Image Handler has been uninstalled. 
 Image Handler creates back up versions of certain files when it is installed before overwriting them. These files have been left in position for reference. They may be deleted but will not effect the functioning of the shop if you leave them in place.
I'm working on a test version of this site which is pretty much a newly launched 1.5 install