When you move the outer frames that are still undrawn, just move them in 1 frame, so that they are the second frame in from each side. You want to keep the brood chamber intact but still place the undrawn frames in a place where the bees will draw them out.
The basic rule in this type of situation is to move the undrawn frames to the edges of the brood chamber, this could mean they might even be the 3rd frame in from each side.