Yay it works. I got the address for Feff6 by doing 'Show package contents' and then typed it into the Feff6 executable box, with Feff6 included at the end. And its all good. Thankyou for the suggestions and quick responses. Cheers, Katy Katy Evans Dept. App. Geol. k.evans@curtin.edu.au Curtin University Tel: 0061 8 9266 4682 Bentley Fax: 0061 8 9266 3153 GPO Box U 1987, WA6845