bitrate for dc audio

[Megalexxx]

Finding a dummy file shouldn't be too difficult : look in the root dir of your game. It's most likely to be named "0Dummy...". It should be the very first file in your root and should contain the same hexa value (for example "00").

If I were you, I just would take N songs to replace Unreal's N songs. If they're too big, I would replace some of them by empty wav files (3 secondes blank songs).
Then I would follow Echelon's selfboot tutorial.