Okay, thanks very much. I thought maybe I was being a bit thick. Hadn't read the manual though I must admit. It seems to me that WorldPay is not that great a deal for anyone. They charge the clients a big chunk, and cannot fully integrate into the site. I would prefer to use Secpay but there is no payments module for that.
But kudos to you for getting this all happening, and I really appreciate your swift help.
Cheers