Full tutorial serie on how to create a run cycle in blender 3D.
You will find here all the HD videos and the blender file.
You can get the updated rig on Luciano Munoz gumroad page :
https://gumroad.com/l/beefy
Please don't hesitate to post your progress on the blender artist thread :
https://blenderartists.org/t/beefy-animation-tutorials/1120712