I found a copy of this album in a local shop and it is much as I suspected - LADY FROM SHANGHAI, MACBETH, THE THIRD MAN, and MR. ARKADIN all seem to be ripped directly from DVDs. WELLES RAISES KANE is the radio broadcast by the CBS Symphony; JANE EYRE is the isolated score which, I'm guessing, was probably booted from the previously-released original tracks.
The sound quality is variable. Sorry to report, Jeff, that the ARKADIN track is the worst-sounding of the lot, with a noticable drop in volume about 2/3 of the way through.
If the isolated music tracks for ARKADIN still exist, there's a chance that they may be released one day in good-quality sound. As I said, we'll be lucky if Universal France does the job since their soundtrack series is uniformly superb.