_sre Import Error Python 2.3.3 Final Win98SE

[DogWalker]

Python 2.3.3 failed to import the _sre [_sre.pyd] distributed with it. Said
it couldn't find it but it could find, for instance, _csv which is in the
same folder.

I replaced the version of _sre.pyd of 2003Dec18 with the version of
2003Sep23 and the import succeeded.

The windows installer added a couple of environmental variables: PYTHON_LIB
looked suspect: c:\Python23\Libs\python22.lib

I had the windows installer install Python 2.3.3 Final in the same folder as
the previous version of Python2.3, creating backup copies of replaced files.

Did I do something wrong? Should I replace other _sre files, too?