Automatic IK set up tutorial in Blender

[kat]

Using Blender 3D's IK system to create an 'localised' IK bone chain in part of a characters skeletal rig. As explained in the written tutorial what this does is create a chain of bones that only affect certain other included bones rather than leaving everything as individual units.
http://www.katsbits.com/tutorials/blender/setting-up-and-using-ik-armatures.php.