Works well, this is one of the reasons I bought an N900!
What I may actually like even more on this script than the video options is that it also allows manual focus for pictures
(simply push the camera button halfway, and after it has focused you can change it. Alternatively, set the camera to 'landscape' mode, since that will disable autofocus. But I am not sure if that doesn't also activate extra sharpening, which is not what you want)