Swapping Attack Animations

I've got an idea for a unique unit for a civ I'm trying to create - essentially a Barbarian Hand-Axe type unit (1 hex range) but using the Barbarian Brute as a base. I want its standard attack animation to be the same as if it were attacking a city or defending from a gun unit (i.e throwing fire bombs) - can this be set in the Artdefines for the unit or is it more complicated than that?

It's not the art defines, it's the .fxsxml file (and the .ftsxml if you also want to change the projectile). See this tutorial.

Thanks for the reply, Nutty. I had seen that tutorial before but since the Barbarian Brute already has the fire bomb attack animation, is all that necessary? Is there no way to simply set which animation plays when performing an action?

Sorry I wasn't clearer. If you aren't going to change the projectile, you only need section III (i.e., changing the event codes in the .fxsxml).