Hi,
1. Yes
2. No. As I said at the end of my previous message:
Restricting the notification based on the payment method selected would be possible with a bit of custom coding in the notification email via the menu System>Emails.
3. There is indeed no such setting. However, the plugin is coded to only send reminder emails for orders with the same status as the one enabled under the "created" column of the System>Order statuses menu. And since that's the order status orders end up in when they are created but not paid, it's normally what you want.
4. This code
www.hikashop.com/forum/4-how-to/883441-d...g-method.html#237550
added to the order reminder email should work just fine to display different message based on the order_status / payment method / shipping method. And you can use
$mail->published = false;
(
www.hikashop.com/forum/install-update/90...-customer-group.html
) instead of displaying a message to not send the email for the current order. So it's quite easy, even for beginners in PHP.