Try borrowing the ITALIERI F/A-18E kit manual or instructions for the layout of the hardpoints. As for the bombs, I can't help with that been suffering the same agony of changing weapons loadouts for every kits I built for the 2 years. But studying most weapons loadouts, heavy bombs & drop tanks occupy the inner pylons/hardpoints. The outer most pylons usually carry missiles such as winders, AMRAAMS, sparrows (for vietnam age AC's).
Hope this might have helped you even a little bit. Good Luck!