One way you might consider approaching it... doing binary compares against stock and modded firmware versions of the same release. You should see "strings" that got replaced by Abel and see those patterns propagate into later versions. Most of his fixes amounted to branch decisions where he forced the outcome to always go the way he wanted (ie, always allow stacking whether the pro lens is detected or not, or never show the battery warning even if non-OEM battery is detected, etc). Those before/after differences should exist in the 3.1 stock firmware too.Well I managed to disassemble at least... have to admit it's a little beyond me to do this level of reverse-engineering at the raw instruction set level, and I don't want to risk bricking my brand new camera...
Unfortunately, it seems like Olympus have pulled firmware 1.4 and 2.0 from their server - that was the update where they opened up pro-capture high to all AF lenses. It would have been interesting to see what might have changed.
BTW, what happened to Abel?