I don't think anyone has done it yet....at least not from what I have read thus far....
but from what I read and in particularly from PulpFiction's sticky...it reminds me alot of when I was into modding the original Xbox...with the unlocks and the 4 partitions....and data structure...and it would make sense being that the Z2 is supposedly running Windows Automotive.....but if memory serves me correctly.....the music file names are encrypted so to speak....and read out gibberish on a PC....in which I want to say was a 16 character hexidecimal file name....
if I remember correctly there was an app that could read those files and convert them back to the Artist/album info( I think WinHex)....but since the ripping function is ran by GraceNote....I highly doubt it would work....
on the other hand....I may see if I can fire up one of those old modded Xbox's and see if I can't unlock my own Z2 drive....
http://www.xbox-scene.com/articles/hdd-install.php
http://www.xbox-scene.com/articles/pc-hdd.php