Also, I'm assuming by your chart that you can't quite replace Summons
Yes, you can. Summon animations come at the absolute indexes 4E to 5F. However, the models themselves do not appear. I should probably add this to the spreadsheets at some point.
For better results, have monsters using these spells directly summon the creatures, rather than trying to put together an appropriate spell with the right sort of animation.
Well that helped me a bunch, as far as understanding how this all works. I think, I just tried and kinda... half...made what I'm trying to do work. It no longer locks up the game, but it used the wrong animation =p
Some animations, even if inputted correctly, will still crash the emulator though.
EDIT 3: Yep, problem is with the animation for the spells I wish to move from Enemy to Player. For whatever reason, those animations won't work, but the spells themselves work just fine with different animations. Unfortunately, the animations are what makes these spells so desired *pout*
As I said, some don't work. Others fail in particular circumstances. For instance, the Adrenaline animation seems to never work, no matter what. By contrast, the Blue Light animation works fine for single-target spells, but will freeze the emulator if used for an all-target spell. As a rule, if an enemy uses it against a single character, it won't work as a multi-target spell - there are some exceptions though (such as Aero3)