How did I manage to post a link to something this useful before Russell? := ) 98 pages of goodness. Absolutely worth having in your digital library.=20 Great coffee-break browsing/review. J --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .