Hi Casey, I have finally managed to add the x-zope-edit mime type to my WinXP/IE6 system (I have done it manually by editing the registry and I don't know if there is a more simple way to do that in WinXP), but I get the following error when I download the document test.txt by clicking the pencil icon: C:\ExternalEditor>c:\Python22\python zopeedit.py c:\ExternalEditor\test.txt FATAL ERROR: unsupported operand types for +: 'NoneType' and 'str' Traceback (most recent call last): File "zopeedit.py", line 685, in ? ExternalEditor(input_file).launch() File "zopeedit.py", line 286, in launch command = self.getEditorCommand() File "zopeedit.py", line 250, in getEditorCommand classname+'\\Shell\\Open\\Command') TypeError: unsupported operand types for +: 'NoneType' and 'str' What is wrong? Should I upgrade to Zope 2.5.1 [I don't think so]? The beta was here and I thought it would do the job for testing your External Editor product. Regards, Juergen