Hmm, I hadn't thought of that. Thanks
Unfortunately, the program doesn't seem to dump the spell name data, so I couldn't get into what I was actually going for, but it's progress at least.
EDIT: I should look around more. http://www.romhacking.net/utils/615/
got me there.
EDIT 2: Successfully inserted both spell and item names from the DS version into the NES version. It doesn't crash, and the spells seem to work.
That said, this poses a new problem: I can't get the script dumper (mentioned in my original post) to create text files - it always produces "Error: Could not open DATA File for compressing." when I select "dump data block to a text file" from the project menu, and I need to be able to do script edits to make a releaseable patch out of this (by correcting in-script references to the item and spell names and such, particularly key items).
EDIT 3: Scratch that, figured out that problem too, it didn't like spaces in the rom filename. Here we go!