Depending on the theme you use it may be possible to work with both URLs (without a redirect), but I doubt. Since XOOPS needs to know your site's URL it only makes sense that you cannot use two different URLs, right?
Marius
$configs[] = array ('name' => 'notification_enabled', 'title' => '_NOT_CONFIG_ENABLED', 'description' => '_NOT_CONFIG_ENABLEDDSC', 'formtype' => 'yesno', 'valuetype' => 'int', 'default' => 1);
$configs[] = array ('name' => 'notification_enabled', 'title' => '_NOT_CONFIG_ENABLE', 'description' => '_NOT_CONFIG_ENABLEDSC', 'formtype' => 'select', 'valuetype' => 'int', 'default' => XOOPS_NOTIFICATION_ENABLEBOTH, 'options' => $options);