How to... Braintree
Go to www.braintreepayments.com/ and create an account. Don't forget to click on the activation mail you will receive via mail.
On the Braintree dashboard, go to Account and click on the submenu Complete Account to provide your business data.
Go back to the dashboard and click on Settings then on Process and link your PayPal-Account (Your have to have a PayPal business account for this to work.
Click on Merchant Account Info in the Account menu. There you will receive your merchant ID. Copy this Merchant ID and paste it to your X-TIX Account.