I just came across a thread over at MobileRead. One MobileRead member went through the effort to find links to firmwares for all the different versions of this ereader made by BenQ.
BTW, I'm talking about the Pantigital Novel with a 6" Sipix screen, not the LCD models. If you're confused by the naming convention, this might help.
I'm not sure that you should risk your Novel, though. I don't have the original firmware for it so if you flash a new one you won't be able to go back.
I really think you should go read that thread.He also found instructions on how to enter the various debug modes
as well as Frank's Wiki, where Frank is beginning to develop his own apps for this ereader.