Thanks anyway, LOCOENG. But I think that only mix the tracks isn't the solution, 'cause you couldn't access its metadata. Thus and then, if I understood correctly, the Nero module that makes the crossfade acts in a "pre-burn" step, and is independent of "burner"...
If you know any, could you suggest some application that could make the job keeping the metadata intact and preserving the hability to advance/return tracks?
Excuse my English, ok?