I created some characters for a friend to use in 3DS Max.  He uses Biped for all his animation and he did find a script to do the conversion to biped.  But honestly, the conversion is pretty bad.  The shoulders and messed up and the neck gets slightly stretched out.  Also, it only converts 2 spine bones.

Does anyone have a different script that doesn't have these issues or does someone have an easy way to make this work?

Thanks