I have been using dual Finder windows since the days of OS 8 with several utilities. Since the Beta OS X I've also used dual Finder windows stacked one on top of the other. When I quite the Finder or re-boot my Powerbook the Finder opens both windows again, same placement as before. Does it work differently for other users?
The script in this software does what it says, just haven't had the recurring problem of having to re-open and re-position my Finder windows more than once in a while. Just a comment.