yes but the electrics etc have to go somewhere. I doubt that the regular chassis will have the HSV position holes cut out, and similarly I wouldn't expect the HSV's to have holes in the regular light positions. There's probably be some kind of pattern there though. I just think having holes in the metal (for the cabling to go through, and bulb swaps) that aren't then filled with the light cluster would lead to leaks etc - and therefore I doubt it is done that way.
Looking at the photo, it would appear at least, that the rear bumper 'stops' half way up the light. which means you need a bit for the top where the normal lights go (or I guess you could disconnect the normal lights, rough 'em up and spray over the top??).
I wonder whether you'd need the inside plastic bit for the boot as well? I mean given the rear of the light cluster is in a different position - not sure if the plastic lining in the boot is common.