Thanks all for your help. They will undoubtedly want to make Schema changes sooner or later, so I think that a separate forest (or perhaps 2, as dave sugested) is/are in order.
All the best, Andy List info : http://www.activedir.org/mail_list.htm List FAQ : http://www.activedir.org/list_faq.htm List archive: http://www.mail-archive.com/activedir%40mail.activedir.org/
