I haven’t watched / listened to these, and I don’t really know what you’re trying to do with the commentaries, Lapti Nek, and Jedi Rocks, though it sounds like you’re trying to replace Jedi Rocks with Lapti Nek by playing Lapti Nek loud enough to drown out Jedi Rocks.

If that’s the case, you could find a music file of the Jedi Rocks song, sync it to the Jedi Rocks that plays during the commentary audio, then flip the polarity / phase of the Jedi Rocks song that you synced to the commentary version, and that should cancel out the Jedi Rocks that plays during the commentary. Then you could add Lapti Nek at normal volume.