How to load a specific animation into a furniture marker using CK?

[timstertimster]

I don’t like how npcs Cross their arms when leaning against a wall. 
 

so I intend to duplicate the leanwallidlemarker, which is an often used vanilla furniture marker.

 

im not sure how to get the copy to use a different animation. I want to use an existing vanilla idle animation.

 

could someone tell me how to do this in CK?