> On line 118, replacing 'install' with 'install_dist' should fix it.

Sadly, it just defers the problem:

vinay@eta-natty:~/projects/dory$ pysetup3 run bdist_wininst
running bdist_wininst
running build
running build_py
running build_scripts
installing to build/bdist.linux-i686/wininst
running install_lib
creating build/bdist.linux-i686
creating build/bdist.linux-i686/wininst
creating build/bdist.linux-i686/wininst/PURELIB
creating build/bdist.linux-i686/wininst/PURELIB/apackage
running install_scripts
creating build/bdist.linux-i686/wininst/SCRIPTS
changing mode of build/bdist.linux-i686/wininst/SCRIPTS/dory to 755
running install_distinfo
creating build/bdist.linux-i686/wininst/PURELIB/dory-0.1.dist-info
creating build/bdist.linux-i686/wininst/PURELIB/dory-0.1.dist-info/METADATA
creating build/bdist.linux-i686/wininst/PURELIB/dory-0.1.dist-info/INSTALLER
creating build/bdist.linux-i686/wininst/PURELIB/dory-0.1.dist-info/REQUESTED
creating build/bdist.linux-i686/wininst/PURELIB/dory-0.1.dist-info/RECORD
Traceback (most recent call last):
  File "/usr/local/bin/pysetup3", line 4, in <module>
    sys.exit(main())
  File "/usr/local/lib/python3.3/packaging/run.py", line 653, in main
    return dispatcher()
  File "/usr/local/lib/python3.3/packaging/run.py", line 642, in __call__
    return func(self, self.args)
  File "/usr/local/lib/python3.3/packaging/run.py", line 91, in wrapper
    return f(*args, **kwargs)
  File "/usr/local/lib/python3.3/packaging/run.py", line 288, in _run
    dist.run_command(cmd, dispatcher.command_options[cmd])
  File "/usr/local/lib/python3.3/packaging/dist.py", line 709, in run_command
    cmd_obj.run()
  File "/usr/local/lib/python3.3/packaging/command/bdist_wininst.py", line 175, in run
    self.create_exe(arcname, fullname, self.bitmap)
  File "/usr/local/lib/python3.3/packaging/command/bdist_wininst.py", line 243, in create_exe
    cfgdata = self.get_inidata()
  File "/usr/local/lib/python3.3/packaging/command/bdist_wininst.py", line 202, in get_inidata
    info = (metadata.long_description or '') + '\n'
AttributeError: 'Metadata' object has no attribute 'long_description'

It appears that there is some confusion as to whether to use attribute or item access. The failing code above needs to be replaced with something like

    if 'long_description' in metadata:
        info = metadata['long_description']
    else:
        info = metadata.get('description', '')
    info += '\n'