The running, jumping, crouch movements are in the biped_physics.wdl..
This is in the A6 templates folder. To customize, simply copy it into
your project folder... From there you can edit it and it should load that one
instead of the default. Or you can select the scripts you need for your project.
Do a dummy publish without creating a resource file and Wed or Sed will
put all those files in the project.cd folder. Then all you have to do
is remove the default includes and set your project up to what you want.

Finally the you can add edit etc all the default wdl's in your project folder to
however you would like your game to behave and look.