How do I make custom animations?

Hey robloxians, I need your help.... I'm trying to make custom animations for my place. I just can't get it to work properly. It keeps breaking.

So yeaaaaahh.. How do I do something like this? http://www.roblox.com/Run-Wild-Anim-Test-place?id=155829159

How do I make those animations change!

Get the official ROBLOX Animation plugin here and then use this wiki link to learn how to use it.