Here is what I found after a brief Google search: Linky (//http://udn.epicgames.com/Two/ActorXMaxTutorial.html#How%20to%20export%20animations%20using%20_ActorX%20and%20Max)
It doesn't say anything about RC specifically, but it is the same editor (right?). But if this works, new static meshes can be imported into RC along with new animations! If I am wrong, shoot down my excitement of feeling important immediately...
EDIT: I would give this a shot, but I don't have the software needed for the animating... :cry:
Static Meshes, yes, Animations, I have not the slightest idea. Someone try it out :P