@ixtab: While I just finished fixing KindleTool to build (hopefully) correct recovery v2 update packages, we'd unfortunately need a patched kernel (more specifically, a patched initramfs) to be able to make them run (the update is entirely run & validated by the recovery tool in the initramfs).
And my brain is already broken after looking at IDA Pro to try to get some of the stuff right for KindleTool >_<".
That said, Yifan (and others since) did it for previous models (and Yifan wrote a bunch of things about how to replicate it), so it's not completely crazy, and if you happen to actually know a bit of ARM assembly (which I don't ^^), that probably helps
On the other hand, If what I'm thinking of doing (following eureka's nudge) actually works, it'll be vastly simpler & faster
. [I'll look into it tomorrow].
EDIT: Done, see #36