method:-
buy a spare lens - or find a lens terminal from a nikon 1 lens. remove the terminal and glue in the right location into a nikon 1 to ef adaptor.
remove the ribbon cable off the terminal and solder trailing wires in its place. check with multimeter and then 5miniute epoxy over to seal your solder work in place so solder joints cant break.
solder the other end of the wires to the corresponding terminals on another nikon 1 lens. Then seal over all the soldering on the lens terminals with a cap and tape it down.
now the camera still thinks the kit lens is attached, and as you depress the shutter you can hear the lens trying to autofocus. while doing so, perform focus on your manual focus lens.
in order to take a photo you need to have an area of the image in focus before depressing the shutter button half way in order to present a green box 'focus' point' mark on the screen. Once focus is confirmed you can hold the shutter half depressed and refocus to your hearts content. then fully press to take the shot.
I did this modification for a mate. He supplied the nikon and 2 lenses. works great!