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Japanese Version
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Change the 'Japanese Version' (the name) into 'MS.mp3'

English Version
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Change the 'English Version' (the name) into 'MS.mp3'

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do NOT change both sounds into MS.mp3 only 1, when you want to change again!
just call the sound you don't want anymore back to normal (English/Japanese Version.mp3) and the other back to MS.mp3

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CHANGE THESE SOUND FROM YOUR MAP IN YOUR CLEO OFCOURSE NOT WHEN YOU EXTRACT IT FROM WINRAR AND THEN CHANGE IT DIRECTLY
DO IT IN THE CLEO MAP! :)