This is the help and support page for bvhacker. bvhacker is free to use, both commercially and otherwise, but if you do use it regularly all I ask is you make a $10 donation:
Tutorial 4: Converting Beyond Motion bvh files for Second Life
Tutorial movie showing how to convert one of the Beyond Motion bvh files for Second Life.
The tutorial also shows how to merge joints and delete descendant joints.
The bvh file for this tutorial can be downloaded from the BeyondMotion website.
A note on intellectual property rights
The bvh files from Beyond Motion are free to use for non-commercial purposes. You can convert them, upload them and give them away. However, you are not permitted to sell animations created from the Beyond Motion samples.