My tracks tend to be very unreliable, but i can talk you through my procedure.
First of all, i now manage to fly "safely", but i wouldn't dare landing or even doing anything more than 30° bank angle.
My procedure/setup:
2*Sidewinder (wingtip), 2*GBU-16 (inner wing), (outer underwing stations empty), Big droptank (belly station), ~70% internal fuel before dropping first bomb
When flying don't drain the external belly tank (i feel the weight helps a bit and after you dropped both bombs you can quickly transfer all the fuel to your internal tanks).
After dropping the first bomb immediately put in aileron trim as needed (and you'll need a lot) and rudder trim to 90-100%.
Keep airspeed under 400 (drag) and over 300. You should be able to get the aircraft to fly straight without much further input.
Now keep an eye on airspeed and watch your sideslip indicator. Changes to speed, AOA, bank angle will upset the aircraft a bit, but you can counter that with rudder. Keep bank angle below 30 and make smooth inputs.
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Next time i want to try draining the internal fuel asymmetrically. Do you know how i would do that? One Booster pump off and crossfeed on?
ps: I pity those who think FBW aircraft are cool.
pps: I had flaps on auto, but i think it might be worth experimenting with one of the other settings to minimize changes in configuration from auto flap system...
Fitzcarraldo's post in How to employ gbu-16 from wing stations without inadvertently crashing was marked as the answer