The above should apply to **any** series 5 Kindle (KT, PW1, PW2, PW3, KT2, KV) and **any** current (5.x) firmware.
Just two things to be certain of:
*) You have a recent jailbreak version installed (so it will 'bridge' the main image changes).
*) You do not install a firmware **older** than the one the device shipped with when the model was introduced.
Note: The PW2 came in two types, 2Gbyte user memory and 4Gbyte user memory, an image from the earlier type (2Gbyte)
will not run a 4Gbyte type. So if doing this to a PW2 device, be certain to follow the advice above.
Note:
Any change in the device's registration status will wipe the MKK keys.
To recover from that -
Either:
re-install the MKK package (if possible)
Or:
re-install the jailbreak (if possible)
Or:
use NiLuJe's 'hotfix' package (should fix anything you did to it
)