Importing a BVH file into Blender using                                  SysAdm's Home Page Reevan McKay's BVH Python script...d
What is a BVH file?
Using the bvh.py file in Blender
How to make other .bvh files
Just give me the .blend files
Blender BVH file repository

I bet you wish it was that easy... Seriously... please read through the above information, it will help you understand this a lot better, even if you think you "KNOW IT ALL!"...