Thanks Cravatts!!! Grabbed your rar file, extract to a thumb drive (I used WinZip) and plug into the unit's USB. After about 15 seconds, I'm in Factory Service Mode! Worked like a charm. I'm from Seattle, WA and I have an AVIC -5200NEX.
Again, thanks for putting in the work (and time). Your good deed is saving a lot of us from being taken advantaged of by some eBay vultures.