As far as I know, you cannot make the weapons visible on the pods. That would require the weapons models being included in the mdl file.

It might be possible to "attach" the weapons to the aircraft. It would have to be along the lines of the way that a parachute and rockets are added to aircraft when you use the Flight Sim Tools STOL kit does it.

I haven't heard anything about an upgrade for Weapon for FSX, but lets hope there is AND it includes the ability to drop bombs. ;)