Can anyone please tell me if its possible to change any of the default settings, ie: when you start FS9 your default aircraft is a Cessna & the default airport is Seattle-Tachoma is it possible to change these to a different aircraft & airport so it will always boot with my prefered aircraft etc Thanks

Yes, simply load a flight the way you want it. Then go to Save flight and check the box that says, make this the default flight.;-)