Andrew, are you still facing the mailing list problem (btw: which mailing list)? Regards -- Markus Neteler <neteler itc it> http://mpa.itc.it ITC-irst - Centro per la Ricerca Scientifica e Tecnologica MPBA - Predictive Models for Biol. & Environ. Data Analysis Via Sommarive, 18 - 38050 Povo (Trento), Italy