Buellwinkle: It may be possible to do as you suggest but the instruction with my kit said....."Allow the dash to dry thoroughly before installing the pieces... place each piece into position, being careful not to press them until you are certain that they are where they belong. If necessary to reposition, use a hair dryer to heat the pieces and slowly peel from the dash...."
It may be possible to reposition when working with the wider portion of a overlay, but it is very problematic if you are dealing with one of the more delicate segments. I had a problem with the segment that applies over the upper center console section (heater/AC panel). I was not satisfied with my alignment and ordered a replacement for that area. The initial order had to be for all parts even though I didn't want the glove box portion. They will, however, provide individual pieces after the intial order.