First time poster! I have finally earned enough AA miles to book a trip to Spain/Portugal. I used AA miles to book PHL-ORD-MAD on US Airways/Iberia in November. I then paid for a flight from MAD-LIS on IB. These are two separate reservations with a 4 hour layover in MAD (I plan to take advantage of the IB arrivals lounge). My question is how do I merge the two separate reservations so my checked baggage goes through to LIS? I really appreciate the help. Thanks!