Having gone through an FRM replacement which resulted in reversed power window operation, I'll tell you that it ultimately required a special coding session with BMW-NA at the helm to remedy it. They had my X5 hooked up to a special dedicated laptop and the session apparently required a lot of bandwith. The dealer's IT guy was freaking out. No one could explain why this was level of programming was required but the normal coding that they can do at the dealer was not sufficient to fix this issue.

__________________
8/2011 X5 xDrive35d Sport, Black Sapphire Metallic, Black Nevada Leather, Fine Burr Walnut Trim
2/2001 M5, Jet Black, Exclusive Complete Black Walk Nappa Point Heritage Leather, Black Cubic Trim