To install:

Install carbonsounds.nfsms using VLTEd 4.6. To do this:
1) Open VLTEd, then click "File", select "Open" and navigate to your NFS Carbon install directory
2) Click "File", select "Import" and then select "Modscript" (or press Ctrl + I)
3) Select carbonsounds.nfsms

Once this is done, save the changes, and then copy all files (except carbonsounds.nfsms)
to SOUND, located in your NFS Carbon install directory.

Update 4/02/2022: Reduced crackling on some samples thanks to new version of
EA_ADPCM_codec, credit CrabJournal.