Ok, I just wanted to let you guys know, over at the Nomadness forums, all the work done for the Series 3 devices, such as the Xtra (which i currently own, soon to have a ZVM or ZVW
can probably help us work with the ZVM. We have been able to do pretty much about the same as you guys with Series 3 hacking, with the exception of changing text on the firmware. We have gotten a couple of guys to dump the firmware (first 8 megs of the hd) and have modified the text and written it back to the drive. Apparently, the Series 3 devices do NOT have a checksum like the ZVM.
Much of the progress you guys have been making can EASILY be ported to the Series 3 devices. They are using the TMS320 processor also but it is a different variant (DA25x i think). Taken from wikipedia: DA25x is an ARM processor and a C55x core. It has som on-chip peripherals like a USB slave controller and security features. Documentation of this chip is only available after signing a Texas Instruments NDA. These variants are used exclusively in the Creative Zen and Dell Digital Jukebox MP3 players, as the primary CPU and signal processor for all processing of MP3 data streams.
Keep up the good work guys, I am going to begin hacking my Zen Xtra even though much of the progress made was dropped back in 2005 and I still don't quite have the money to shell out for another player.