Thanks for the input. The aircraft i'm working on is in such large scale that if i go through with this, i'll be using 2 large sheets of styrene to accomplish what i'd like to do. The plus side i would imagine is that the aircraft has windows down the side which 'should' allow the plastic to pull down a lot better.
I've formed normal items with detail before, but never tried forming a 'bowl'. Guess it'll be trial and error.
Thanks again!