Well, since I've been asked a few times, here's a very short tutorial about how to create an audio CD using a cue sheet and a flac file:
- first you should convert the .flac file into .wav format using a converter, for example the one you can find here;
- now put the .wav file and the .cue file in the same folder;
- open the .cue file with your favourite burning software;
- et voilà!