Build an IK chain for each leg and then you can lock one foot to the floor,move the other foot ahead, lock the second foot and unlock the first for the next step, etc.
I've been having real trouble with this. Some of the strange things are:
-after unlocking a locked foot it can jump positions
- a locked foot can be stuck at floor level, but sometimes still slides along on playback.
I initially thought that there must be some sort've conflict when using pre-made walk sequences, but there's trouble when animating a walk in scene mode as well.
You should see what i'm talking about within just a few paces.....
or is it me.....?