The script doesn't behave on my Mac with PP2010.  When I double-click a script nothing happens at all - it doesn't work and I get no error messages.

The script allows me to choose a python editor and the "Edit script" option in the menu isn't greyed out anymore but I can't actually edit anything - when I choose edit nothing happens.

I downloaded Dizzi's script as well and it seems to work, at least the simple scripts I tried with it: