Not yet tested, i'm downloading it right now but like I wrote, I deleted my save accidentally so i have to restart...Unless Asia81 share his save
As the BGM between JP and US versions doesn't have the same names, just copy-pasting all the japanese files in the us folder should not activate the orchestral BGMs.
(Because in the pack I sent you, there are no BGM as they have different files and the pack I sent you only cover the files which have the same names).
To activate the orchestral BGMs, the japanese files have to be renamed according to the english filenames (Left : Japanese names ; Right : English names) :
"BG_001.pcm16.bcstm" -> "BG_001.dspadpcm.bcstm"
"BG_002.pcm16.bcstm" -> "BG_002.dspadpcm.bcstm"
"BG_003.pcm16.bcstm" -> "BG_003.dspadpcm.bcstm"
"BG_004.pcm16.bcstm" -> "BG_004.dspadpcm.bcstm"
"BG_005.pcm16.bcstm" -> "BG_005.dspadpcm.bcstm"
"BG_006.pcm16.bcstm" -> "BG_006.dspadpcm.bcstm"
"BG_007.pcm16.bcstm" -> "BG_007.dspadpcm.bcstm"
"BG_008.pcm16.bcstm" -> "BG_008.dspadpcm.bcstm"
"BG_009.pcm16.bcstm" -> "BG_009.dspadpcm.bcstm"
"BG_010.pcm16.bcstm" -> "BG_010.dspadpcm.bcstm"
"BG_011.pcm16.bcstm" -> "BG_011.dspadpcm.bcstm"
"BG_012.pcm16.bcstm" -> "BG_012.dspadpcm.bcstm"
"BG_013.pcm16.bcstm" -> "BG_013.dspadpcm.bcstm"
"BG_014.pcm16.bcstm" -> "BG_014.dspadpcm.bcstm"
"BG_015.pcm16.bcstm" -> "BG_015.dspadpcm.bcstm"
"BG_016.pcm16.bcstm" -> "BG_016.dspadpcm.bcstm"
"BG_017.pcm16.bcstm" -> "BG_017.dspadpcm.bcstm"
"BG_018.pcm16.bcstm" -> "BG_018.dspadpcm.bcstm"
"BG_019.pcm16.bcstm" -> "BG_019.dspadpcm.bcstm"
"BG_020.pcm16.bcstm" -> "BG_020.dspadpcm.bcstm"
"BG_022.pcm16.bcstm" -> "BG_022.dspadpcm.bcstm"
"BG_023.pcm16.bcstm" -> "BG_023.dspadpcm.bcstm"
"BG_024.pcm16.bcstm" -> "BG_024.dspadpcm.bcstm"
"BG_025.pcm16.bcstm" -> "BG_025.dspadpcm.bcstm"
"BG_026.pcm16.bcstm" -> "BG_026.dspadpcm.bcstm"
"BG_027.pcm16.bcstm" -> "BG_027.dspadpcm.bcstm"
"BG_028.pcm16.bcstm" -> "BG_028.dspadpcm.bcstm"
"BG_029.pcm16.bcstm" -> "BG_029.dspadpcm.bcstm"
"BG_030.pcm16.bcstm" -> "BG_030.dspadpcm.bcstm"
"BG_031.pcm16.bcstm" -> "BG_031.dspadpcm.bcstm"
"BG_032.pcm16.bcstm" -> "BG_032.dspadpcm.bcstm"
"BG_033.pcm16.bcstm" -> "BG_033.dspadpcm.bcstm"
"BG_034.pcm16.bcstm" -> "BG_034.dspadpcm.bcstm"
"BG_035.pcm16.bcstm" -> "BG_035.dspadpcm.bcstm"
"BG_036.pcm16.bcstm" -> "BG_036.dspadpcm.bcstm"
"BG_038.pcm16.bcstm" -> "BG_038.dspadpcm.bcstm"
"BG_039.pcm16.bcstm" -> "BG_039.dspadpcm.bcstm"
"BG_040.pcm16.bcstm" -> "BG_040.dspadpcm.bcstm"
"BG_042.pcm16.bcstm" -> "BG_042.dspadpcm.bcstm"
"BG_043.pcm16.bcstm" -> "BG_043.dspadpcm.bcstm"
"BG_044.pcm16.bcstm" -> "BG_044.dspadpcm.bcstm"
"BG_045.pcm16.bcstm" -> "BG_045.dspadpcm.bcstm"
"BG_046.pcm16.bcstm" -> "BG_046.dspadpcm.bcstm"
"BG_052.pcm16.bcstm" -> "BG_052.dspadpcm.bcstm"
"BG_053.pcm16.bcstm" -> "BG_053.dspadpcm.bcstm"
"BG_055.pcm16.bcstm" -> "BG_055.dspadpcm.bcstm"
"BG_056.pcm16.bcstm" -> "BG_056.dspadpcm.bcstm"
"BG_057.pcm16.bcstm" -> "BG_057.dspadpcm.bcstm"
"BG_058.pcm16.bcstm" -> "BG_058.dspadpcm.bcstm"
"BG_059.pcm16.bcstm" -> "BG_059.dspadpcm.bcstm"
"BG_060.pcm16.bcstm" -> "BG_060.dspadpcm.bcstm"
"BG_062.pcm16.bcstm" -> "BG_062.dspadpcm.bcstm"
"BG_063.pcm16.bcstm" -> "BG_063.dspadpcm.bcstm"
"BG_064.pcm16.bcstm" -> "BG_064.dspadpcm.bcstm"
"BG_065.pcm16.bcstm" -> "BG_065.dspadpcm.bcstm"
"BG_066.pcm16.bcstm" -> "BG_066.dspadpcm.bcstm"
"BG_068.pcm16.bcstm" -> "BG_068.dspadpcm.bcstm"
"BG_069.pcm16.bcstm" -> "BG_069.dspadpcm.bcstm"
"BG_075.pcm16.bcstm" -> "BG_075.dspadpcm.bcstm"
"BG_076.pcm16.bcstm" -> "BG_076.dspadpcm.bcstm"
"BG_077.pcm16.bcstm" -> "BG_077.dspadpcm.bcstm"
"BGM_FO_SAMPLE.pcm16.bcstm" -> "BGM_FO_SAMPLE.dspadpcm.bcstm"
With those modifications, I guess it shouldn't crash (if the japanese BGMs caused crashes, I guess people who played the english undub would also get the crash).