I've tried to add this to the configure file: (/store/wholesale/includes/configure.php)

define('DIR_WS_IMAGES', 'images/');
define('DIR_WS_ADDITIONALIMAGES', '/store/images/');

And substituted DIR_WS_IMAGES with DIR_WS_ADDITIONALIMAGES in the modules/additional_images.php

But it won't work.. Any idea why?