'Aggro' AI

[Beefcake]

Anyone know how to set up a pack of creatures that'll aggro eachother if one is attacked? Im sure I could spend days and days figuring out some shoddy ghetto route but can someone simplify it?

 

[Beefcake]

and likewise, does anyone know an easy 'leash' effect for creatures not to chase someone all over the map?

 

[Nuggzy]

Did you figure this out? I need to do that with a couple things I am working on but haven't had a chance to look at it yet.