Scripts installed with ``bdist_wininst`` will always use ``#!python.exe`` or
``#!pythonw.exe`` as the executable name (even when built on non-Windows
platforms!), and the wrappers will look for the executable in the script's
parent directory (which should find the right version of Python).
(backport from trunk)

--HG--
branch : setuptools-0.6
extra : convert_revision : svn%3A6015fed2-1504-0410-9fe1-9d1591cc4771/sandbox/branches/setuptools-0.6%4053194