My apologies. It isn't Sony, it's Virgin. 7243 8 66494 2 3
I notice that the disc includes an audio.exe, skin.exe, audio.dll, wmmp.exe file amongst others in a /player directory, so this would explain why an occasional 'can't find any playable files' message occurs. And I guess also why it has to be ripped to an HDD to get to the .cds file, which at 50+ mb would seem to be the actual music file/s.