This site might be helpful in order to make your own soundtrack . . .
Please note that M4-78 music aren't listed on the soundtrack, as it was implemented in the game. The tracks are available on the PC game discs however.
Good possible titles for those files might be:
mus_a_801 = 801dro M4-78 - Ambient music 1
mus_a_800 = 802dro M4-78 - Ambient music 2
mus_a_800b =803dro & 804dro M4-78 - Ambient music 3
mus_a_800core = 805dro ,806dro &807dro M4-78 - Ambient music 4
mus_bat_800 and mus_sbat_800= M4-78 - Battle Music
801= M4-78 - Landing Arm
802= M4-78 - Central Zone
803= M4-78 - Enviromental Zone
804= M4-78 - Industrial Zone
805= M4-78 - Core
806= M4-78 - Archon 1 core (ES-05)
807= M4-78 - Archon 2 core (IS-24)
Hope this was helpful!