In order for the music to work, MP3s must be placed in this folder, in the following format. For your convenience, this is the list of songs it looks for, and when it looks for them. If you want the original music for the game, I have already compiled a music pack (PSPLegacyMusicPack.zip) as a separate download.

song1.mp3 - DOOM: E1M1
          - Plutonia: MAP17, MAP29
song2.mp3 - DOOM: E1M2
          - Plutonia: MAP01
song3.mp3 - DOOM: E1M3
          - Plutonia: MAP02
song4.mp3 - DOOM: E1M4
          - Plutonia: MAP04
song5.mp3 - DOOM: E1M5, E4M4
          - Plutonia: MAP19
song6.mp3 - DOOM: E1M6, E3M6
          - Plutonia: MAP03
song7.mp3 - DOOM: E1M7, E2M5, E3M5, E4M8
          - Plutonia: MAP10, MAP18
song8.mp3 - DOOM: E1M8, E3M4, E4M1
          - Plutonia: End of game screen, MAP06, MAP31
song9.mp3 - DOOM: E1M9, E3M9, E4M9
          - Plutonia: MAP05
song10.mp3 - DOOM: E2M1
           - Plutonia: MAP07, MAP27
song11.mp3 - DOOM: E2M2
           - Plutonia: MAP08, MAP28
song12.mp3 - DOOM: End of level screen, E2M3
song13.mp3 - DOOM: E2M4, E4M6
song14.mp3 - DOOM: E2M6, E4M7
song15.mp3 - DOOM: E2M7, E3M7, E4M5
           - Plutonia: MAP15
song16.mp3 - DOOM: E2M8
           - Plutonia: MAP14, MAP32
song17.mp3 - DOOM: E2M9, E3M1
           - Plutonia: MAP16
song18.mp3 - DOOM: E3M2, E4M2
           - Plutonia: MAP13
song19.mp3 - DOOM: E3M3, E4M3
           - Plutonia: MAP09
song20.mp3 - DOOM: E3M8
           - Plutonia: MAP12
song21.mp3 - DOOM: Intermission screen
           - Plutonia: MAP30
song22.mp3 - DOOM: Title screen
song23.mp3 - DOOM: End of game screen
           - Plutonia: MAP11
song24.mp3 - DOOM 2: MAP01, MAP15
song25.mp3 - DOOM 2: MAP02, MAP11, MAP17
song26.mp3 - DOOM 2: MAP03, MAP21
           - TNT: MAP19
song27.mp3 - DOOM 2: MAP04
           - TNT: MAP24
song28.mp3 - DOOM 2: MAP05, MAP13
           - TNT: MAP25
song29.mp3 - DOOM 2: MAP06, MAP12, MAP24
           - Plutonia: MAP24
song30.mp3 - DOOM 2: MAP07, MAP19, MAP29
song31.mp3 - DOOM 2: MAP08, MAP14, MAP22
           - TNT: MAP12
           - Plutonia: MAP22
song32.mp3 - DOOM 2: MAP09
           - TNT: MAP21, MAP32
song33.mp3 - DOOM 2: MAP10, MAP16
song34.mp3 - DOOM 2: MAP18, MAP27
song35.mp3 - DOOM 2: MAP20, MAP26
           - TNT: MAP03
           - Plutonia: MAP20, MAP26
song36.mp3 - DOOM 2: MAP23
           - TNT: MAP23
           - Plutonia: MAP23
song37.mp3 - DOOM 2: MAP25
           - Plutonia: MAP25
song38.mp3 - DOOM 2: MAP28
song39.mp3 - DOOM 2: MAP30
song40.mp3 - DOOM 2: MAP31, End of game screen
song41.mp3 - DOOM 2: MAP32
song42.mp3 - DOOM 2: End of level screen
           - Plutonia: End of level screen
song43.mp3 - DOOM 2: Title screen
           - Plutonia: Title screen
song44.mp3 - DOOM 2: Intermission screen
           - Plutonia: Intermission screen, MAP21
song45.mp3 - TNT: MAP01, MAP09
song46.mp3 - TNT: MAP02, MAP15
song47.mp3 - TNT: MAP04, MAP13, MAP29
song48.mp3 - TNT: MAP05, MAP17
song49.mp3 - TNT: MAP06
song50.mp3 - TNT: MAP07
song51.mp3 - TNT: MAP08, MAP27, MAP30
song52.mp3 - TNT: MAP10, MAP18
song53.mp3 - TNT: MAP11
song54.mp3 - TNT: MAP14
song55.mp3 - TNT: MAP16, MAP26
song56.mp3 - TNT: MAP20
song57.mp3 - TNT: MAP22, MAP28
song58.mp3 - TNT: End of level screen, End of game screen, MAP31
song59.mp3 - TNT: Title screen
song60.mp3 - TNT: Intermission screen
song61.mp3 - Heretic: E1M1, E3M1, E4M6
song62.mp3 - Heretic: E1M2, E3M6, E4M2
song63.mp3 - Heretic: E1M3, E3M5, E4M3
song64.mp3 - Heretic: E1M4, E2M5, E4M4, E5M5
song65.mp3 - Heretic: E1M5, E3M7, E4M5
song66.mp3 - Heretic: E1M6, E3M4, E4M1, E6M3
song67.mp3 - Heretic: E1M7, E4M7
song68.mp3 - Heretic: E1M8, E4M8
song69.mp3 - Heretic: E1M9, E3M8, E4M9
song70.mp3 - Heretic: E2M1, E5M1
song71.mp3 - Heretic: E2M2, E5M2
song72.mp3 - Heretic: E2M3, E5M3
song73.mp3 - Heretic: E2M4, E5M4
song74.mp3 - Heretic: E2M6, E3M9, E5M6
song75.mp3 - Heretic: E2M7, E5M7
song76.mp3 - Heretic: E2M8, E5M8
song77.mp3 - Heretic: E2M9, E5M9
song78.mp3 - Heretic: E3M2, E6M1
song79.mp3 - Heretic: E3M3, E6M2
song80.mp3 - Heretic: End of level screen
song81.mp3 - Heretic: Title screen
song82.mp3 - Heretic: Intermission screen
