To unlock these V4 preview songs, go to Options and go to e-Amusement ID. The 1st password says "Thank You For Enjoying GF/DM". The 2nd password,"2007", must be inserted into the 2nd box.

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Password|Effect
39U4-ENJ0-Y1NG-GFDM 2007|Unlock "Feel The Breeze" and "Inside-Out"
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