Locians, If you want to check out how the groovy new GUI is coming along, you can get the CVS module or download a tarball from the Web site: http://bioinformatics.org/loci/download/loci-core-19990521.tar.gz You will of course need gnome-libs and gnome-python to run it. Let me know if you run into any problems. This should give you an idea as to how the Work Flow Diagram will look and work. :-) Jeff -- J.W. Bizzaro mailto:bizzaro at bc.edu Boston College Chemistry http://www.uml.edu/Dept/Chem/Bizzaro/ --