You'd have to pretty much use a python script to do that... otherwise, you'd have to go in and change each one of the lights, one by one, and if you only have P4 and not PPP or P5, that isin fact your ONLY option. Also, when adding a new light set, Poser only adds new lights or changes existing ones... any "extras" are either ignored, or turned "black".

Remember, kids! Napalm is Nature's Toothpaste!