I wasn't talking of the loading screen speeches, those are indeed replaced files, but the first song played when entering game or in the diplo screen.
Here's the code of the file to update the database in my add-on mod:
Code:
<?xml version="1.0" encoding="utf-8"?>
<!-- Created by ModBuddy on 9/15/2013 1:52:39 AM -->
<GameData>
<!-- USSR ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
<Audio_Sounds>
<Row>
<SoundID>SND_LEADER_MUSIC_USSR</SoundID>
<Filename>_NationalAnthemUSSR</Filename>
<LoadType>DynamicResident</LoadType>
</Row>
</Audio_Sounds>
<Audio_2DSounds>
<Row>
<ScriptID>AS2D_LEADER_MUSIC_CATHERINE_PEACE</ScriptID>
<SoundID>SND_LEADER_MUSIC_USSR</SoundID>
<SoundType>GAME_MUSIC</SoundType>
<MaxVolume>40</MaxVolume>
<MinVolume>40</MinVolume>
<IsMusic>True</IsMusic>
</Row>
<Row>
<ScriptID>AS2D_LEADER_MUSIC_CATHERINE_WAR</ScriptID>
<SoundID>SND_LEADER_MUSIC_USSR</SoundID>
<SoundType>GAME_MUSIC</SoundType>
<MaxVolume>40</MaxVolume>
<MinVolume>40</MinVolume>
<IsMusic>True</IsMusic>
</Row>
</Audio_2DSounds>
<!-- France ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
<Audio_Sounds>
<Row>
<SoundID>SND_LEADER_MUSIC_FRANCE</SoundID>
<Filename>_NationalAnthemFrance</Filename>
<LoadType>DynamicResident</LoadType>
</Row>
</Audio_Sounds>
<Audio_2DSounds>
<Row>
<ScriptID>AS2D_LEADER_MUSIC_NAPOLEON_PEACE</ScriptID>
<SoundID>SND_LEADER_MUSIC_FRANCE</SoundID>
<SoundType>GAME_MUSIC</SoundType>
<MaxVolume>30</MaxVolume>
<MinVolume>30</MinVolume>
<IsMusic>True</IsMusic>
</Row>
<Row>
<ScriptID>AS2D_LEADER_MUSIC_NAPOLEON_WAR</ScriptID>
<SoundID>SND_LEADER_MUSIC_FRANCE</SoundID>
<SoundType>GAME_MUSIC</SoundType>
<MaxVolume>30</MaxVolume>
<MinVolume>30</MinVolume>
<IsMusic>True</IsMusic>
</Row>
</Audio_2DSounds>
<!-- Germany ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
<Audio_Sounds>
<Row>
<SoundID>SND_LEADER_MUSIC_GERMANY</SoundID>
<Filename>_NationalAnthemGermany</Filename>
<LoadType>DynamicResident</LoadType>
</Row>
</Audio_Sounds>
<Audio_2DSounds>
<Row>
<ScriptID>AS2D_LEADER_MUSIC_BISMARCK_PEACE</ScriptID>
<SoundID>SND_LEADER_MUSIC_GERMANY</SoundID>
<SoundType>GAME_MUSIC</SoundType>
<MaxVolume>40</MaxVolume>
<MinVolume>40</MinVolume>
<IsMusic>True</IsMusic>
</Row>
<Row>
<ScriptID>AS2D_LEADER_MUSIC_BISMARCK_WAR</ScriptID>
<SoundID>SND_LEADER_MUSIC_GERMANY</SoundID>
<SoundType>GAME_MUSIC</SoundType>
<MaxVolume>40</MaxVolume>
<MinVolume>40</MinVolume>
<IsMusic>True</IsMusic>
</Row>
</Audio_2DSounds>
<!-- USA ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
<Audio_Sounds>
<Row>
<SoundID>SND_LEADER_MUSIC_AMERICA</SoundID>
<Filename>_NationalAnthemUSA</Filename>
<LoadType>DynamicResident</LoadType>
</Row>
</Audio_Sounds>
<Audio_2DSounds>
<Row>
<ScriptID>AS2D_LEADER_MUSIC_WASHINGTON_PEACE</ScriptID>
<SoundID>SND_LEADER_MUSIC_AMERICA</SoundID>
<SoundType>GAME_MUSIC</SoundType>
<MaxVolume>40</MaxVolume>
<MinVolume>40</MinVolume>
<IsMusic>True</IsMusic>
</Row>
<Row>
<ScriptID>AS2D_LEADER_MUSIC_WASHINGTON_WAR</ScriptID>
<SoundID>SND_LEADER_MUSIC_AMERICA</SoundID>
<SoundType>GAME_MUSIC</SoundType>
<MaxVolume>40</MaxVolume>
<MinVolume>40</MinVolume>
<IsMusic>True</IsMusic>
</Row>
</Audio_2DSounds>
<!-- U.K. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
<Audio_Sounds>
<Row>
<SoundID>SND_LEADER_MUSIC_UK</SoundID>
<Filename>_NationalAnthemUK</Filename>
<LoadType>DynamicResident</LoadType>
</Row>
</Audio_Sounds>
<Audio_2DSounds>
<Row>
<ScriptID>AS2D_LEADER_MUSIC_ELIZABETH_PEACE</ScriptID>
<SoundID>SND_LEADER_MUSIC_UK</SoundID>
<SoundType>GAME_MUSIC</SoundType>
<MaxVolume>40</MaxVolume>
<MinVolume>40</MinVolume>
<IsMusic>True</IsMusic>
</Row>
<Row>
<ScriptID>AS2D_LEADER_MUSIC_ELIZABETH_WAR</ScriptID>
<SoundID>SND_LEADER_MUSIC_UK</SoundID>
<SoundType>GAME_MUSIC</SoundType>
<MaxVolume>40</MaxVolume>
<MinVolume>40</MinVolume>
<IsMusic>True</IsMusic>
</Row>
</Audio_2DSounds>
<!-- China ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
<Audio_Sounds>
<Row>
<SoundID>SND_LEADER_MUSIC_CHINA</SoundID>
<Filename>_NationalAnthemChina</Filename>
<LoadType>DynamicResident</LoadType>
</Row>
</Audio_Sounds>
<Audio_2DSounds>
<Row>
<ScriptID>AS2D_LEADER_MUSIC_WU_ZETIAN_PEACE</ScriptID>
<SoundID>SND_LEADER_MUSIC_CHINA</SoundID>
<SoundType>GAME_MUSIC</SoundType>
<MaxVolume>40</MaxVolume>
<MinVolume>40</MinVolume>
<IsMusic>True</IsMusic>
</Row>
<Row>
<ScriptID>AS2D_LEADER_MUSIC_WU_ZETIAN_WAR</ScriptID>
<SoundID>SND_LEADER_MUSIC_CHINA</SoundID>
<SoundType>GAME_MUSIC</SoundType>
<MaxVolume>40</MaxVolume>
<MinVolume>40</MinVolume>
<IsMusic>True</IsMusic>
</Row>
</Audio_2DSounds>
<!-- Greece ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
<Audio_Sounds>
<Row>
<SoundID>SND_LEADER_MUSIC_GREECE</SoundID>
<Filename>_NationalAnthemGreece</Filename>
<LoadType>DynamicResident</LoadType>
</Row>
</Audio_Sounds>
<Audio_2DSounds>
<Row>
<ScriptID>AS2D_LEADER_MUSIC_ALEXANDER_PEACE</ScriptID>
<SoundID>SND_LEADER_MUSIC_GREECE</SoundID>
<SoundType>GAME_MUSIC</SoundType>
<MaxVolume>60</MaxVolume>
<MinVolume>60</MinVolume>
<IsMusic>True</IsMusic>
</Row>
<Row>
<ScriptID>AS2D_LEADER_MUSIC_ALEXANDER_WAR</ScriptID>
<SoundID>SND_LEADER_MUSIC_GREECE</SoundID>
<SoundType>GAME_MUSIC</SoundType>
<MaxVolume>60</MaxVolume>
<MinVolume>60</MinVolume>
<IsMusic>True</IsMusic>
</Row>
</Audio_2DSounds>
<!-- Italy ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
<Audio_Sounds>
<Row>
<SoundID>SND_LEADER_MUSIC_ITALY</SoundID>
<Filename>_NationalAnthemItaly</Filename>
<LoadType>DynamicResident</LoadType>
</Row>
</Audio_Sounds>
<Audio_2DSounds>
<Row>
<ScriptID>AS2D_LEADER_MUSIC_AUGUSTUS_PEACE</ScriptID>
<SoundID>SND_LEADER_MUSIC_ITALY</SoundID>
<SoundType>GAME_MUSIC</SoundType>
<MaxVolume>40</MaxVolume>
<MinVolume>40</MinVolume>
<IsMusic>True</IsMusic>
</Row>
<Row>
<ScriptID>AS2D_LEADER_MUSIC_AUGUSTUS_WAR</ScriptID>
<SoundID>SND_LEADER_MUSIC_ITALY</SoundID>
<SoundType>GAME_MUSIC</SoundType>
<MaxVolume>40</MaxVolume>
<MinVolume>40</MinVolume>
<IsMusic>True</IsMusic>
</Row>
</Audio_2DSounds>
<!-- Japan ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -->
<Audio_Sounds>
<Row>
<SoundID>SND_LEADER_MUSIC_JAPAN</SoundID>
<Filename>_NationalAnthemJapan</Filename>
<LoadType>DynamicResident</LoadType>
</Row>
</Audio_Sounds>
<Audio_2DSounds>
<Row>
<ScriptID>AS2D_LEADER_MUSIC_ODA_NOBUNAGA_PEACE</ScriptID>
<SoundID>SND_LEADER_MUSIC_JAPAN</SoundID>
<SoundType>GAME_MUSIC</SoundType>
<MaxVolume>40</MaxVolume>
<MinVolume>40</MinVolume>
<IsMusic>True</IsMusic>
</Row>
<Row>
<ScriptID>AS2D_LEADER_MUSIC_ODA_NOBUNAGA_WAR</ScriptID>
<SoundID>SND_LEADER_MUSIC_JAPAN</SoundID>
<SoundType>GAME_MUSIC</SoundType>
<MaxVolume>40</MaxVolume>
<MinVolume>40</MinVolume>
<IsMusic>True</IsMusic>
</Row>
</Audio_2DSounds>
</GameData>
the files with VFS set to true:
_NationalAnthemChina.mp3
_NationalAnthemFrance.mp3
_NationalAnthemGermany.mp3
_NationalAnthemGreece.mp3
_NationalAnthemItaly.mp3
_NationalAnthemJapan.mp3
_NationalAnthemUK.mp3
_NationalAnthemUSA.mp3
_NationalAnthemUSSR.mp3