I’m currently doing my own little fan project (for myself) for where I’m getting rid of the unnecessary audio tracks from a Blu-ray (foreign language tracks, subtitles for said tracks and remixed tracks) and adding the preferred audio track from a DVD to take the Blu-ray’s main audio track.

To add further to the question, I want to add the DVD audio track to it, getting rid of the unnecessary audio tracks and subtitles already from the BDMV folder, but keeping everything else (main video track without resizing, special features and if possible the main menu) intact exactly as it is.

Is it possible and if so, how would it be done?