I have been luring on may game sites for a few years and I found that if you open a bvh file with MS excel it gives you a good hierarchy. Here you can modify the file to fit your figure.

Example
in the BVH Right hand is Right Hand
In the figure Right hand is RHand

Just rename the part to RHand in the BVH and save it.

This can be done is notepad but very hard to follow the hierarchy. 

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