How to import SS two-handed animations into Kingdoms?

I guessed that it would be a simple case of unpacking animations and replacing them from one mod into the other, and then packing again. But SS seems to have very different animations structure in descr_skeletons and it also has some extra animations too it seems, and I am wondering which animations are relevant to fixing the so called "two-handed bug".

Is it enough to just replace relevent CAS files? Or do I have to do something else also, like editing descr_skeletons and adding the extra animations? The goal is to completely replace two handed attack animations in Kingdoms with the ones from SS.

Please help.