Updated version of the script in now available from the download link in the first post. It adds a user parameter that specifies the value used to disable image stabilization (IS). The default action is now to not attempt to disable IS.
This was added because reyalp figured out that setting the wrong value in the IS prop can cause crashing on at least some cameras.
As there is no easy way for the average user to figure out what value to use for IS disable, adding this selection effectively removes IS disable as part of the script's normal functionality. Given that we don't know for any camera if IS can actually be disabled by setting the prop, this is probably not a bad thing.