LOL Vance, we've been doing the same homework tonight
I am on the same page as you...the wimax.img that is saved via recovery contains your keys.
So what I stated earlier was in fact wrong, (felt wrong but I dont post outta my butt if I can help it so I didnt want to speculate) if your keys are lost simply flashing the wimax radio wont fix that.
Been living on the edge all this time, who knew?