FFVII PSX Attack Animation Confusion

[LostWingx]

Alrite, so I have been using Wallmarket to change a lot of Magic Animations successfully.  For example, I've changed 'Sleepel' (animation 0B) to 'Laser' and used animation BB which uses the 'W-Laser' animation like Jenova BIRTH uses.  This works fine and so do at least a dozen other newly created spells.  However, after repeated testing, there are many animations that either Crash the Emulator, Freeze the Game, or Continues running the game but never shifts back to character control.  Two examples of attack animations that do this are 'Lv. 2 Confu' (85), and 'Avalanche' (81).

So my question is, Are certain attack animations simply not able to be used on the PSX version (idk why this would be), or is there a special method for replacing certain attack?  Are they not stored on Disk 1's KERNEL or something else strange?  Has anyone else encountered this problem? 

I have read all the information regarding changing animations using Wallmarket and used the same procedure for the attacks that work successfully and the attacks that fail.  I was really looking forward to having an Avalanche Spell to cast.

[nfitc1]

So my question is, Are certain attack animations simply not able to be used on the PSX version (idk why this would be), or is there a special method for replacing certain attack?  Are they not stored on Disk 1's KERNEL or something else strange?  Has anyone else encountered this problem?

It is quite possible that Disc 1 doesn't have the animation files you want. It's also possible that certain attack animations are specific to the intended performer of it (most limits are like this) or the battle background (eg. Super Nova).
Sorry I don't have any helpful advise to offer, but I'm just pointing out some possibilities as to why it doesn't work.

[LostWingx]

I see.  Well unless someone else knows a fix to this problem, it seems I will have to test using certain attacks on other disks or seeing what happens when I use Avalanche against that big ice dragon in great glacier since he is the only enemy I am certain uses the Avalanche attack.  Thanks for the help, hopefully someone else knows something about this.

Edit:  Oh, I reread your post, I guess i can try using the spell with the corresponding battle background.  That might just be whats going on.