Change soundtrack?

[Alice®]

change soundtrack from external source?
tool tried (was able to extract the game file from kvs to ogg): http://www.filedropper.com/kvs2ogg065b1sse3

These are the soundtracks swap from the original ones. feels kinda weird when play the game while listening these:

main menu song
https://www.youtube.com/watch?v=zDyUZmsV4To

scenario selection sub menu song
https://www.youtube.com/watch?v=aHmszREnQdU

ending credit song
https://www.youtube.com/watch?v=zBgE_jENdQw

battle theme:
https://www.youtube.com/watch?v=GNaK1klQ8II&list=PL2297B7E17CE2260A

army left castle song
https://www.youtube.com/watch?v=GEAAR5PulSU