(Request) Judgement Day FFVII over Final Dungeon FFVI

It would just mean that you don't need to factor in +200 for everything is all. The addresses and offsets become absolute, I think is the right word. You can also use SNESTool to easily re-add the header on if you wish, some select tools and patches due require the header. I find it much easier to not have a header unless I need to.

So I could do all the songs I want without the header, then put it back on and it will still process the correct instruments?

EDIT: Also, I only realized yer Song Locations were factoring in the +200 bcuz I had previously been adding +200 to them on my own and that's why it was all jumbled xD