you can also use morph targets to change the feet to fit the high heals.. i know i have seen them in the free section here. try searching for it.. if that doesnt work. a quick and dirty method that i have used is.. create the walk with the walk designer, delete all the keyframes for the Y-trans for the hips then raise the hips (with IK turned on) for the first frame.. ya might loose a little bounce in her step, but its hardly noticable..