REQUIRES ROOT

Open Titanium Backup
Press the menu button then select Import backup (.TiBkp)
Use your file manager and select "Magic.Piano.v1.0.2.Unlocked.Songs.TiBkp"
Restore App+Data
And your done

Make sure you don't update to 1.0.4 because it will lock all the paid songs.

It includes all songs other than the newest 16.