You have to update the .cfg file with a buncha lines that can be found on the last page of that forum thread.

I've had some success with ripping the drm off of some files. I had to install and authorize itunes on my pc. Now, how to do that to my whole library, and put it back on the mac.. : /

batty.. you've moved around itunes libraries.. right? and done some consolidation tricks or something?