@phoenix512: I'm not sure kaznelson has published
ready-made files for 5.4.2.1 yet (or if the 5.4.2 ones work on 5.4.2.1), so you'll have to ask him, or do it the hard way:
Cf.
https://www.mobileread.com/forums/sho...postcount=1577 &
https://www.mobileread.com/forums/sho...postcount=1588 &