I recently achieved Star Alliance Silver from Aegean Airlines, and I have a few questions about it that I can't seem to find direct answers to. 1)For new bookings, I remember reading a while back that I provide my Aegean Airlines number first and then change it to my preferred airline when checking in, is that correct? 2)For existing and award bookings, how would I let US Airways or United know that I have Star Alliance Silver, since I use their FF number for the bookings? 3)Is there a chance of being upgraded as Star Alliance Silver/Gold on US Airways and United? I understand it depends on the fullness of the flight but I've seen conflicting answers browsing the forum. Hopefully the answers will benefit others who are having the same questions.