I want add a promotion/an option for customers:
If total price in cart above 50 dolar, customer can select wire transfer as a payment method. Also, If total price in cart equals to 50 dolar or above, a new payment method will appear at payment section.
Is it possible?
Actually the Addon you mention connects shipping methods with payment methods.
To do what you want you will need Χρηματικό Όριο στις Αποστολές - CS-Cart Addons/Πρόσθετα at Cscart.Biz | CS-Cart Market by Dvs.gr
Or
Χρηματικό Όριο στις Πληρωμές - CS-Cart Addons/Πρόσθετα at Cscart.Biz | CS-Cart Market by Dvs.gr
The one involves shipping and the other payment methods.