@ixtab/knc1: Yup, the one attached in the first post is already repacked for the K5 + PW, with proper progress handling for FW 5.x in the install scripts, and no extra OS X extattr files

. (and is what GM installed)

.
As for the nomenclature, agreed, and I like PW (or KPW)

.
(I messed up in KindleTool, should have called the device pw instead of kpw, to follow what was done with the dx... Will probably ninja-fix it by accepting both, and documenting only one...).
EDIT: Cf.
this post.