| A fish swimming scene max9: http://www.seageo.com/show/UPLOAD/fish(max9).zip Preview animation: HERE
Script tested in max8 and max9. Version history:
update version 1.1
fixed:error when the scene has biped object. update version 1.2
fixed:script controller error in max8. update version 1.3d
*add filter fucntion to manage spring node by comment.
*loop before bake:loop animation few times before baking,get stable action in loop animation
*bake animation speed,when you get good movement with different animation speed,use this funciton to bake it.
*subsample,use "bake with subsample frames" button to do more percise calulation. update version 1.4
*press esc key to exit when baking
*make it work in max8 update version 1.4g max8
*fix some bug in max8,and take away the "force update" function. | 
