Search the CONFOCAL archive at http://listserv.acsu.buffalo.edu/cgi-bin/wa?S1=confocal I need to hear back from those who have said they have software for tracking cells and particle movement. Please let me know if you are ready to bring in demo version. Regards, Joe Goodhouse Confocal / EM Core Laboratory Department of Molecular Biology Princeton University 609-258-5432 Visit us at http://www.molbio.princeton.edu/facility/confocal/index.html