Copying to your ROM a song available on the Forum

So apparently the 200 bytes DON'T carry over with pointer values?

You gotta consider the header for everything when calculating offsets but none of the game code require headered values and the game never has the knowledge you have a header or not. No SNES cart had an header back in the days.

Can you tell me a software where I can freely remove and put back headers?  I think my coding would be a lot easier without all this byte conversion.

SNEStuff that is available here. There are others like Tush I think. What I do is just open HxD (hex editor) and delete first $200 bytes and add $200 times 00 when I need a header for FF3SE as an example.

I'm glad you finally had this working :D