Ian Curington has created this module as part of a "marker suite" 
of AVS demo modules, networks, and sample data sets.  You can
download these modules individually from the IAC using
anonymous ftp to the appropriate directories in 
/avs_modules at avs.ncsc.org. If you would like to
download the entire suite of modules, networks, and sample
datasets at the same time, the IAC recommends that you use
anonymous ftp to grab the following file from avs.ncsc.org -
/sample_data/avs_data/marker_toolkit/marker_suite.tar.Z.