What does it do:
This adds support for "BARCLAY ESSENTIAL (BASIC) OR EXTRA (ADVANCED)" payment integration solutions from http://www.barclaycard.co.uk/business/accepting-payments/e-commerce/
Customers are redirected to the gateway site to pay, then returned to your cart success page after successful payment.
* You will of course need to have a gateway account.
* PCI Compliant
* No need for private SSL
* No files overwritten
* Redirect Return processing
* Debug Mode (logs debug info to your system error log for troubleshooting)
* Full support of error handling.
* Test mode supported