Changing from Artist to Album

[BC69]

Hi, I have ripped about 1200 CD's as FLAC to preserve my collection. Unfortunately I ripped these using the default setting of listing by Artist. My collection is 95% classical so it has saved them by for example, London Philharmonic: Bernard Haitink etc. I would like to save these as Albums. Can this be now done without having to re rip?
Cheers,
BC
What I mean is I would like to file as Beethoven Piano Concertos 1 -2 rather than by London Philharmonic: Bernard Haitink etc