Prestashop - payment integration - hosted payment page

What do I have - ready to go internet shop(prestashop) - everything is up and running except payments. Contract with payment gateway provider. We go for redirect integration(hosted payment page) - this is where a customer shops on our site and then they are passed over to a secure site on payment gateway provider(PGP) server to enter in the credit card details. All the sample code and documentation for this can be found on PGP resource center - [login to view URL] (integration guide redirect) The job is: To fully integrate our website into PGP systems using the Redirect Integration method. The following steps must be completed: 1. Developer must ensure that a correctly formatted authorisation request is sent to the hosted payment page ([login to view URL]) from a known referring URL 2. Developer must ensure that our website can receive and process the authorisation response 3. Developer should style the hosted payment page according to the internet shop design In other words - connect the payments according to payment gateway provider guide and style hosted payment page according to shop design Please do not hesitate if you have any questions