Hi, I'm trying to rip the all the background music from my PS2 game Dual Hearts, seeing as there isn't a soundtrack released for it.As I do not have any experience in doing this, I really need all the help I can get.When i slot in the game DVD into my DVD drive, there were these files in the DVD:

ADPCM.IRX
BGM(Doesn't really show it but when I open its Properties window, it listed it as a .DAT file)
DATA(Same with BGM)
DEMO.PSS
DENSHO.PSS
DUMMY(No association.Properties listed it as File)
IOPRP234.IMG
LIBSD.IRX
MCMAN.IRX
MCSERV.IRX
MOTION(Same with BGM and DATA)
OPENING.PSS
PADMAN.IRX
SDRDRV.IRX
SIO2MAN.IRX
SLPS_250.26(Type was listed as 26 files in Properties)
SNDN2DRV.IRX
SYSTEM(Type was listed as SpeedDial in Properties)

I assumed that the music files were contained in the BGM file and proceeded to try to extract them from it.Knowing that it was a .DAT file, I immediately googled for a .dat music extractor and found extractors like AOA.However, when i tried to extract the file, it says that BGM.DAT cannot be opened.I would really appreciate any efforts to help me with this.Thank you for your kind attention.