You download the latest PyXML distribution for your Python from http://pyxml.sourceforge.net.
But it said that it could not find the correct Python version?
Simply open the downloaded PyXML exe file with Notepad++, search for the Python version string which the PyXML wants (e.g., 2.4). Edit the 2.4 with your Python version (e.g., 2.5). Save the file.
And execute the exe file.
It should install the PyXML.