Edit: Just reread your intro post and realized your building an Aussie F/A-18A, disregard the info I posted then. I will leave it up though for anyone wanting to build the Academy 1/72 F/A-18C.
Just a tip if your doing a modern Hornet, assymetrical loadouts have been pretty plentiful since the start of OEF and OIF, if your doing a Desert Storm or Kosovo era loadout, the symmetrical loadout is fine.
A modern loadout you could do using what's in the box would be... AIM-9s on the wingtips, 1 AIM-7 on the right fuselage station or leave that station empty (I would leave it empty since the AIM-7 is pretty much no longer in use), the FLIR pod on the left fuselage station. Only 2 external fuel tanks, one on the centreline pylon the other on the inner right wing pylon, 3 GBU-12s, one under each left wing pylon and one under the outer right wing pylon. Even the AIM-9s on the wingtips could be ommited as it was realized fairly early in OEF and OIF that there were not gonna be any opposition in the air.