Thanks for your suggestion. I will visit his site.
The files I used for B&W printing are existing B&Wfiles. In fact they are the testimages I found on northlight-images.co.uk
I've got a 7880 here and the ABW mode works a treat. If you look on the page you got the test images from, you should see links to the reviews, which include the 3800 and 4880 - both have references to B/W printing with ABW. I think there is also more ABW stuff in some of the paper reviews too
Keith Cooper - Northlight Images