Hello. Only ending1 & ending2 I had to deinterleave & then manually concatenate/merge the audio streams. Not really MANUALLY, I had to remove the video frames using a (really large) offset list & a batch file & spreadsheet. ending-post-fastscroll & intro-movie-not-a-fmv 's audio frames were separated by only 0x0 (until 0x1000-multiple completion). So now the only missing tracks for this rip are the PSG. Enjoy more adpcm.
Eventually I will upload the rip to the joshw server (hope it gets accepted). Thank you everyone for your tips.