Dear John thanks for that - I'll add it to the handout. Sounds good- I'm particulary interested in things which are getting grey literature out there cheers david ________________________________________________________________________ This e-mail has been scanned for all viruses by Star Internet. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk ________________________________________________________________________