something you might consider also is just making a program which rips SMB levels out of a NES rom and inserts them into the SMAS rom.. then you wouldn't have to make a whole level editor and could just use SMUtil. That is unless you want to make the level editor
i wouldn't be surprised of the level data is exactly the same in both roms
The data in the game is NOT the same as the NES version. Trust me. F objects in Super Mario All-Stars are different and there are 3-bytes to edit them in that order. Again, I have it but unable to host my document.
Castle Edits are extremely hard to edit than the NES version. And the few other stuff that was not in the NES version such as backgrounds, music, etc. But all level headers remain the same.
Yeah, I have a few screenies about the SNES game which I'm going to finish my Afterworld 8 project really soon when my computer gets fixed up.
I hope Spel_Werdz_Rite did give you all of his data. A level editor would be nice too. Until I get my computer fixed and upgraded. I'll be able to give you my latest document of the game.