I went out and got a replacement motherboard, got an ASUS board this time, so maybe it won't die on me. Will send the old (dead) board back for an RMA, as it's only 14 months into a 36 month warranty. Will use that for a backup machine then, so I can test the map better, avoid stupid errors with packaging the map and such (path / script errors show quickly when you test on another computer, especially if you share map resources with your other maps like I do). Should be back up and running by the end of the weekend hopefully. Time will tell (and with a little luck the other stuff still works).