I believe Leovampire has already done some work along these lines, and released a mod for it -- you might want to take a look:
[REL] Better IJNAF Bomb Loads
http://www.subsim.com/radioroom/showthread.php?t=115803
I was using that mod for a bit just before 1.3 was released, but I admittedly didn't have too many run-ins with aircraft to get a good idea of the changes made. I also haven't re-installed it since 1.3 as I haven't checked to see whether it'll be compatible, yet.
nomad_delta