Bruce, I have followed closely the instructions given to me by Matt. If Matt and you agree I can write the instructions for the OSX users. I am saying this even though I am not experienced. I only know that now things work properly for me. Maybe I can write a sort of document and mail it to you and Matt, and then you filter it and we can make it public. How does it sound? Stefano -- ____________________________________________ Stefano Ciurli Professor of Chemistry Department of Agro-Environmental Science and Technology University of Bologna Viale Giuseppe Fanin, 40 I-40127 Bologna Italy Phone: +39-051-209-6204 Fax: +39-051-209-6203 "Fatti non foste a viver come bruti, ma per seguir virtute e canoscenza" Dante Alighieri - Inferno - Canto XXVI