These methods will set an IK key of the respective type for the given biped node.
This function will reset a limbs IK pivot points, which is useful if you are seeing oddities (such as popping) when you are using scale subanims.
There is an ActionItem available for this function.
This function will bake the Move All Mode information directly into the biped.
There is also an ActionItem for this function.
Biped MaxScript Extensions