Thanks, everyone, for the help. I've been busy today but will try to look into it more this weekend. -- Hoyt ++++++++++++++++++++++++++++++++++++++++++++++++ + Hoyt Koepke + University of Washington Department of Statistics + http://www.stat.washington.edu/~hoytak/ + hoytak at gmail.com ++++++++++++++++++++++++++++++++++++++++++