Thanks Mike it underlines that you use horses for courses with Photoshop. I tried Fluidmask but gave up when I saw the time it would take on this image to get a good selection. I don't think it would be quite as successful with fussy hair extraction but CS5 Refine edge might make it worth trying. I found that if I made a Clipping Mask and pasted the new background into the image I did not need to place it behind the top layer or invert the selection. Saves a few steps but comes to the same thing.