Unfortunately, the py2exe binary distribution, version 0.4.1, contained broken binaries for Python 2.3, for building Windows NT services. I've uploaded a new binary installer for Python 2.3 only, and changed the version number to 0.4.2. <http://prdownloads.sourceforge.net/py2exe/py2exe-0.4.2.win32-py2.3.exe?downl...> If you are still using Python 2.2, there's no need to change anything. Enjoy, Thomas