Thanks @sithlord48, this is useful, but I'm wondering how these IDs were derived.
I can make the assumption that the enemy model hrcs are sequentially based aa,ab,ac, 1,2,3 etc, and I've found the exe offset for the playable characters (FROG -> CHAOS, ff7_en.exe, 0x004FE310), but I would be interested in if anyone could explain HOW or where they found the data linking the scene.bin enemy IDs to the battle models in battle.lgp.
I'd prefer not to hardcode it in what I'm doing but generate the information from the sources.
@halkun Any Ideas?