Quick question about adding people using this plugin. You mention the option to Re-send the welcome email for anyone who has not already logged into your store. Does that mean you would be entering in people who have already created accounts on your site? If so, how does the plugin handle existing accounts and which field is the criteria for whether the account is unique or not? This is my first Zen-cart (or any cart for that matter) and I'm still trying to get a grasp of the whole thing. Thanks for your help.