Thanks everyone, I am going to experiment with various combinations but right now I've opted for the g-data plugin. Regards Nick -- Nicholas Dickens BSc ARCS MRC FGU, Department of Human Anatomy & Genetics, South Parks Road, Oxford, OX1 3QX, UK Tel: +44 1865 2 82650 http://fgu003.anat.ox.ac.uk:8080/ http://smart.ox.ac.uk/