Generally speaking, yes.
There are a variety of ways to flash the linux kernel, I've been considering it but don't have the picture firmly in mind.
Here is a good thread to read through I think?
https://www.mobileread.com/forums/sh...ad.php?t=91862.
Things are probably a lot eaiser if you have a serial port to use for recovery, but at least in that thread he did it without one.
I'll let someone else come talk about the various partitions and boot phases of the kindle system.
As I understand it, the linux kernel lives in the uImage partition, I'm not entirely sure of how it interacts with the filesystem.