Requires:
  - Python 1.5.2 with Distutils 0.9 or higher, or Python 2.x

  - HTML is provided in tarball.  To regenerate from .pdx files, need Pdx:
    http://www.seanet.com/~hgg9140/comp

This is a standard distutils install:

  cd workdir
  cp xyz-0.1.tar.gz myworkdir
  cd myworkdir
  gzip -cd xyz-0.1.tar.gz | tar xvf -
  cd xyz-0.1
  python setup.py build
  python setup.py install  #possibly as root