Car Seat Causing Problems

[cpr]

We got our X5 as our baby mobile but I've run into an issue when the rear-facing car seat is installed in the middle of the 2nd row. The belt used to hook to the LATCH system gets in the way of the belt buckles for the outside seats of the 2nd row. My wife sits in the back with the baby so we have no choice but to mount the car seat by the window so my wife can buckle up while back there. The problem is, I don't want to mount the seat next to the door because of the airbags. Has anybody gotten a car seat installed in the middle while retaining the use of the belt buckles for the outside seats?