Dave, There is an entry in the FAQ that answers your question: http://cars9.uchicago.edu/cgi-bin/ifeffit/faqwiz?req=all#2.8 In your case, I would recommend burning all the update packages to a CD or copying them to a memory stick. Remember that you need to install each update package sequentially. That is, if your home machine is at update #4, then you need to unpack updates 5, 6, 7, and 8 before unpacking #9. B -- Bruce Ravel ----------------------------------- ravel@phys.washington.edu Code 6134, Building 3, Room 405 Naval Research Laboratory phone: (1) 202 767 2268 Washington DC 20375, USA fax: (1) 202 767 4642 NRL Synchrotron Radiation Consortium (NRL-SRC) Beamlines X11a, X11b, X23b National Synchrotron Light Source Brookhaven National Laboratory, Upton, NY 11973 My homepage: http://feff.phys.washington.edu/~ravel EXAFS software: http://feff.phys.washington.edu/~ravel/software/exafs/