So, I tried the guide that was posted to downgrade to the 4.2.2 camera update, got all of the fastboot stuff done successfully and went to reboot it.
NOW... the damn thing won't even turn on. Not even when I plug it into the charger. F*ck.
So... what do I need to do to get this think back up and running? I really don't want to owe her $300 for whatever happened.