well, with some inital experimentation, .flac files aren't imported by jemplode. but i wanna see if i encode with OGG encapsulation (i think its similar to the old .wav encapsulation of mp3 files; tho i forgot for what reason that was for). hopefully, it'll work. more updates when i experiment more.
Flac encapsulated in Ogg is not currently supported by the car-player (or, for that matter, by Karma). For now it's ".flac" files only.

Peter