[GRASS-windows] wingrass 6.4 installation problem

[M July]

I downloaded the native version wingrass-6.4.osvn-r40049-1-setup.exe and
performed the installation.  I'm using a Windows Vista 32-bit system.  Two
icons appeared on the desktop as a result of the installation.  When I
double click the msys.bat icon I first get an error window:
python.exe-Entry Point Not Found
The procedure entry point
?PyWinObject_As Handle@@YAHPAU_object@@PAPAX at Z could not
be located in the dynamic link library pywintypes25.dll <pywintype at 25.dll>

When this window is closed, the "M" window has the following text:
Cleaning up temporary files ...
Starting GRASS ...
Traceback (most recent call last):
  File "c:/GRASS-6-SVN/etc/wxpython/gis_set.py", line 848, in <module>
    import gui_modules.gcmd as gcmd
  File "c:\GRASS-6-SVN\etc\wxpython\gui_modules\gcmd.py", line 42, in
<module>
    from win32file import ReadFile, WriteFile
ImportError: DLL load failed: The specified procedure could not be found.
Error in GUI startup. If necessary, please
report this error to the GRASS developers.
Switching to text mode now.
Hit RETURN to continue

When RETURN is hit, Grass shuts down.  I don't know anything about python
(or wxpython), but both of the objectionable files exist:
File "c:\GRASS-6-SVN\etc\wxpython\gis_set.py"
File "c:\GRASS-6-SVN\etc\wxpython\gui_modules\gcmd.py

If I need to be an expert in Python and other arcane subjects, I should
probably just give up now.  On the other hand if it is not hard to get GRASS
running, I'll keep at it - provided someone can tell me what I did wrong or
can point me to some documentation that can help me get this up and running.

Thanks.
Matt
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