Thanks for the info. Regards -- Loughborough University of Technology tel : (0509)263171 ext 4164 Computer-Human Interaction Research Centre fax : (0509)610815 Leicestershire LE11 3TU e-mail - (Janet):C.V.Copas at uk.ac.lut G Britain (Internet):C.V.Copas%lut.ac.uk at nsfnet-relay.ac.uk