HOWTO USE THE TCL/TK APP IN 'jp3d/tcltk'
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1. Download the 'BWidget-1.9.2'
    http://www.sourceforge.net/projects/tcllib/

2. Install it e.g. in '/usr/local/BWidget-1.9.2/'
3. Add the lappend command in line 4
  to jp3d/tcltk/LPI_JP3D_VM.tcl:

#!/bin/sh
# The next line is executed by /bin/sh, but not tcl \
exec wish "$0" ${1+"$@"}
lappend auto_path /usr/local/BWidget-1.9.2