I have about 80,000 miles with NWA. Recently I got to Silver status. I prefer to fly Continental, since on my first trip on them recently they seemed much better. I also prefer AmWest, although I don't fly them much. With my new status on NWA, they will upgrade me. Is there a way to get the other two airlines to give me the same status? If so, how? And what proof do they require? Thanks.