I think that it would be nice if PMDG looked at all airlines in the world and gave them relevent aircraft the correct livery, also they should look at military veriations (e.g. Air Force One) for the 747.also can anyone give me info on how to contact PMDG?

hi,I don't think that Air Force 1 is a 747-400. If I remember correctly they are 747-200's - there are two of them.Rob

Yep, specially modified 747-200's, fitted with -400 type GE engines and it has a Satcom antenna(Or at least something that looks like it) between the nose and cockpit. It's referred to as the Boeing VC-25A (747-2G4B)

Yes, and they are also equipped with an in-air-refueling system.