Lay out the stones on the lawn in the location where you are installing the pathway. Position the stones so that you can easily step between them.
Score the ground immediately around the stones by driving a spade straight down around the perimeter.
Remove the stones from the path of the walkway. Try to keep them in the order you set them.
Dig the sod up where you set the stones, going deep enough to remove the roots.
Add sand to the holes and place the stones on top.
Tap the stones down with a rubber mallet until they are slightly above the surface of the lawn.