Ok, got it (as noted here). The small and medium came out pretty good (some room for improvement, but they're quite readable.

The problem I have now is that I apparently don't know what the large font is used for. I did a quick copy & paste job to get a large font (some letters look pretty bad, but I'll worry about that later). The problem I have is that the visuals with scrolling text aren't using the large.bf font I uploaded. Is that a hidden file somewhere?
(see attchment comparing desired display with actual)

It's not that much of a problem, I can just avoid those visuals. I'm quite happy that the menus and track info display playlist/song titles properly with the new font.