Thanks for the advice. Much appreciated. The plug-in works very well for printing Targets. My customer hadn't installed the latest plug-in.
The ipf6400 is a great printer. I visited him as he's not far away, and time was of the essence, and I was doing it as a freebie. We printed charts on two medias, and I profiled one there (11.00 pm) and one at my office the next day.
There is a very sad story behind this which explains the reason for the hurry. My customer is a semi-pro photographer and had recently shot a friend's wedding, and was struggling with the prints. His friend's wife, who is only 27, sadly is terminally ill with only a very short time left. He wanted to get some lovely prints on canvas to her. She is delighted with the photos apparently.
So thanks again to all who helped.
Phil