Thanks all for your help. I think I have this sorted now. Owen.
-- ****************************************************** Owen Matthews Theoretical Astrophysics Tel: +44 (0)116 2522084 University of Leicester Fax: +44 (0)116 2522070 University Road Leicester [EMAIL PROTECTED] LE1 7RH ------------------------------------------------------ http://www.astro.le.ac.uk/~owm ******************************************************
