[HELP] Combining different armature in .nif

[nakrulz]

I have a question/problem. I usually make my armor mods with weight copy from the original body shape, then I would parent the armor to the armature that came with the body and use it. Works fine.

 

But here's my question:

I want to make a long pair of boots. There's no problem copying the weights and they should work fine. But the problem is the armatures. It would need the armatures from the feet mesh as well as the body mesh (for the upper part of the leg). I tried combining the two armatures using join function, but when I test it the mesh would go crazy.

Is there a way to join two armatures and have them work, or am I doing something wrong?

 

Thanks!