To use eWAY (by NAB) as you payment gateway, log into your Bookeo Account. Click on "SETTINGS", then on "Online payments".
Select the "Payment Gateway" tab
then choose eWAY from the drop down list of payment gateways. Enter you eWAY Customer ID, your eWAYusername and eWAYpassword.
If you do not have an eWAY account yet, you can click on the link "Sign up for an eWAY account" to be directed to eWAY's home page.