Don't use the anchor feet stuff. You have to set sliding keys. It's in the 'Key Info' rollout. It is a red dot with an arrow through it sitting on a blue block. Also, that IK Blend option is in CS 4, its in the 'IK Blend' rollout in the 'Key Info' rollout as well. If you need more help, let me know.
The "set planted", "set sliding", and "set free" buttons are really just presets to change the ik information in the rollout. This is really pretty basic biped functionality that is covered very well in the help file. Have you tried reading that?
OK, this confuses a lot of people, so here goes: The anchor controls in Biped are only meant to give you temporary assistance when positioning a character. They are not animatable, nor exportable. They just give you a temporary means for holding a hand or foot in place, as you work on setting up a pose. You'll notice that…
so I did several searches on google and the best tutorial I came up with was one using CS R2. http://www.3dlinks.com/LinkSender3.cfm?ID=2588 I was really excited until I discovered that they got rid of the IK panel in CS 4 so I can't do the IK blending like the tutorial suggests. I can get feet to anchor perfectly, but I…