I was just pointed to this application: http://www.biophys.uni-duesseldorf.de/local/POLAND/poland_help.html I hadn't seen it before. Cheers. Jeff -- J.W. Bizzaro Bioinformatics Organization, Inc. (Bioinformatics.Org) E-mail: jeff at bioinformatics.org Phone: +1 508 890 8600 --