Booked a flight on AA, ends up being a code share with BA (AA FLight 6194). anyone have experience with this? I had to contact (call) BA to change seats already. They seemed to Honor my AA Plat. (Sapphire/Ruby Whatever) Questions:

Can I use the Lounge in the Intl. Terminal at ORD with my Admiral's club?

Can I use points for Upgrade like on a normal AA flight to LHR?

Does the Flight end in the normal AA Terminal or over at T5? If so, can I use my Admiral's club pass there?