the UV deluxe tool isnt mel based, so make sure your posting the code into a python tab. make a python tab in the script editor past this code in from UVDeluxe import uvdeluxeuvdeluxe.createUI() than save to shelf.
to answer the original question the fastest way to get those perfectly on top of each other is to select both in face mode and than do a new planar projection from the front. done. now seeing your final uv map where more than 50% is unused space id strongly advice to not yet go ahead and start texturing but to layout your…