You should have a text file called Ranged Attack Animations.txt or something like that. It Comes with the respective Module for editing them.
It lists every Spell Animation, such as Arrows, Actual Spells and Hand Axes/Javelin (yes all of These Count as spells)
Really? As far as I know, FE 8 handles Hand Axes, Hatchets and Tomahawks a bit... odd.
I had the same issue, and setting both to "Animation for a Weapon Type" did it for me (which is actually really strange now that I think about it).
I better change that before anything screws up...
Also, it would be good to know when exactly the game freezes. If it's already in the battle Screen with both sprites showing up, then you failed at assigning the animation for the Hand Axe in the Module (which shouldn't be the case as you Edits look correct to me).
If it freezes with a blackscreen before the battle screen shows up, you messed up the animation inserting part in FEditor. Check if you really inserted it at the correct index number (and whether you really expanded the Maximum index number) and don't forget to hit save (sometimes ist as simple as that).
