1. Create a new Add-On Make a new project, and choose 'Add-on' as the type. Also tell it to load data from Story, and to target Story. This will load all the levels, characters, items, and so on from the campaign, and set your mod to modify the story campaign with your change...
you got the spell's song name where the underscored adresses refers (RoseKavalier suggest to see here if you made no mistake, nice trick example for slow : 9c 80 68 00 => 00 68 80 9c then substract 40 00 00 => 00 28 80 9c and adress here says "muckmire.wav" ; that's it ^...