Sending line items to Sagepay

[Stephen Provis]

Hi, new to ActiverMerchant and looking for a little assistance please.

I'me using SagePay (in the UK) and in order to integrate with our Sage back end we need to pass the line items from the basket through to Sagepay - this is done by passing the item values in the basket field in the following format ( source: http://www.sagepay.co.uk/file/25041/download-document/FORM_Integration_and_Protocol_Guidelines_270815.pdf?token=dxf28sowRKXwjDh99Pl33lJjIcExhhDBu2HcydcD7YA page 33 ):

4:[PR001]Pioneer NSDV99 DVD-Surround Sound System:1:424.68:74.32:499.00:499.00:[PR002]Donnie Darko Director’s Cut:3:11.91:2.08:13.99:41.97:[PR003]Finding Nemo:2:11.05:1.94:12.99:25.98: Delivery:000:000:000:000:4.99

How would I pass this information via Active Merchant?

Thanks,

Stephen