song manager and project m

[UltimaNylocke]

So I downloaded Lakora's Song Manager and it is spectacular. I just have some questions with how it works with Project M. Specifically the Custom Song Volumecode which lets me add volume to a custom song (in case I want to put something over Pokefloats). But to my knowledge I have to save it over the GCT codeset. I don't know how this would work with Project M because (once again, I may be wrong) it has a different GCT codeset. Would it work, or do I have to do something else to make it louder?

[UltimaNylocke]

So uh, I had no help here and tried it anyway. Didn't go well... thanks....
Oh well. Now the real question is, how can I edit the volume code in Project M if I can't use Brawl Song Manager's volume adjuster? Fountain of Dreams is too loud, the N's Castle Medley I downloaded is too quiet...