I tried that embedding thingy too in calibre, but I am calibre and "hack" challenged, so of course I wasn't going to figure that one out.
I have the PW1 and couldn't even figure out how to get fonts on there and then I realized, I didn't really want to to that in case something goes wrong.
So I tried the embedding to see what another font would look like, but none of the books I tried it on show it on my PW.
Oh well, it is what it is.