8 Dragons question

As for the 8 dragons, iirc there is one event bit per dragon that is set in the Dragon NPC event after you kill it, the game use those to display how many dragons are left and other stuff. So the Veldt White Dragon is never counted in this.

Pardon my ignorance, as hex editing is not my thing - but where is this event bit triggered? Is it triggered via the formation, by the monster itself, or outside the battle?

It seems to me that if the Veldt dragon does not trigger any event, then I should be just fine swapping the Prometheus with the White Dragon, as long as the event still pulls up the same formation (which will point to the new White Dragon ID#)

Those save states won't work with a hacked rom, will they?