Hi
It failed though I've got the message "Hush baby" during mrpi install. I think I know why: my Kindle version is -nearly- the original one, 5.7.4.

and the packages I've tried to install work for much more recent PW3 versions, like 5.13.0 or so.
If this is correct, it seems I have one alternative:
- either find an archive version of mrpackage (on my screenshot it was named mrpackage
s) and kual compatible with 5.7.4.
- or installing a PW3 kindle version compatible with the current packages, redo the jailbreak, etc... which looks more complicated.
Choice will have to be done upon availability of one or the other.