Well, I don't think there are much more ways than this hack, with the exception of writing your own update packages - which I would consider being even more advantaged stuff than just using the usbNetwork hack. FWIW, I do not remember the procedure as being all that complex, though.
But using the usbNetwork hack you're all set to shoot yourself in the knee rather badly (as in "bricking your Kindle"), so I would at least suggest doing this only if you have enough knowledge to judge about what exactly you're doing.
|