There's a few more things:
You can add TTF fonts to the fonts directory in the DK system folder, and they will show up in the fonts list, worked fine for me. I extracted the fonts from the fonts hack in the wiki that contains droid sans etc.
These look a bit ugly though
Tried some other more typical book fonts like baskerville bembo palatino, look much better.
You are limited to how many fonts you can add. I think only 7 or so. And it doesn't seem to like otf, only ttf.
They are gifs stored in system loadingpicture.
You can edit them if you want. I removed the chinese text from the USB image to test this out, because it was bugging me. I'll fiddle with editing the duokan logo. I don't mind the logo, but I don't really like seeing the characters, I'd rather it be in english
The typesetting and translation on a lot of the stuff is very poor.
A lot of the text strings are reused - "normal" is used over and over again for like 3 settings.
Does anyone know how to edit the other text strings/where they are stored. What's in the .img files/ .dat files, and how the whole layout of everything works. I have not had the time to fiddle with much yet.