Greetings All, Many thanks to those who have responded to my query, both on and off list. I now have some useful reference material to look at. Brendan. -- BRENDAN MAGILL Business and Information Technology Consultancy, Training and Research Yew Tree Cottage Winnall Common Allensmore Herefordshire HR2 9BS England Phone: +44 (0)1981 570660 Fax: +44 (0)870 127 7856 Web: www.magill.co.uk ________________End of message______________________ Archives and tools for the Disability-Research Discussion List are now located at: www.jiscmail.ac.uk/lists/disability-research.html You can JOIN or LEAVE the list from this web page.