Skyrim, help with the animation

[Gary Hooper]

Hello, recently I've learned making new animations for Skyrim from this tutorial. 

 

 

And I've successfully created some animations that work.

 

But what I'm looking here is that, is there any way to start making animations from a new pose? Like the idlesit_crosslegged? In other words, is there any way if I can import Skyrim's hkx, (or .kf) files when making animation? 

Thanks in advanced