I dislike having leg IK on by default when a character is loaded, but IK can somtimes be usefull. Rather than remove IK completely I prefer to disable its default On status. I do this by opening the cr2 in a text editor. I do a search for 'Leg' which takes me to the 'inkyChain' section of the cr2, and for the right and left leg I change I change 'on' to 'off'. I then do a global search and replace of 'Leg' with 'LegG'. Now the leg IK is off by default, but can be turned back on through 'Figure>Use Inverse Kinematics'.

There is one last step, as Shadownet pointed out "the feet get screwed up" this is because the translation values for the feet are none zero in some figures. You have to go to the translate channels for the feet and set them to:

k  0  0

Usually it is only the translateX channel that is none zero. Also set the initValue line to zero.