The ratings are stored in MTABLE.SYS. If you save this file to disk, then change a song’s rating and do a binary file comparison between the file on the Clip and the one you saved, you’ll see the value change. Unfortunately it isn’t obvious how to mathematically determine the offset of the rating (it’s not near the tag information), so I’ll leave it to someone who cares to figure this out. 
Message Edited by PromisedPlanet on 07-29-2009 07:49 AM
