[vtkusers] VTK4.0 and Python 2.2

[Joshua Foster]

I think I have found the source of incompatibility between my VTK and Python
installations:  the python wrappers were built for Python 2.1, not 2.2.
Therefore, when you try to import vtkCommonPython, vtkGraphicsPython, etc,
you get "DLL load failed:  The specified module could not be found", because
the dll's are referencing "python21.dll".  Now I just hope I can find Python
2.1 to install in place of my 2.2.

Josh