Make shure you have latest RedShop version
Install it using joomla installer
Configure payment by accessing Components->RedShop "Payment" button
Set Payment Name as you like
Set Published to Yes
Click Save & Close
Get your DineroMail email and merchant ID (Resumen->Numero de cuenta [For merchant number, get rid of the last slash and number] ). Click Here
Additional info for DinermMail Chile users: Because of DineroMail Chile restrictions, you are required to verify your account before you can use any payment method offered by DineroMail. More info here http://www.blogdineromail.com/validacion-de-cuentas-dm-chile/
1.5.1: Compatibility fix for RS 18.104.22.168.
1.5.0: First Release.