I wanted to check in here to see if anyone had success with this. I have a '12 SEL without touch/nav (just the 4" screen) but I also have the strange situation of an OEM camera already being installed in the liftgate, even though it wasn't optioned with one. This was a leased car and has all of 15k miles on it, so I can't imagine the leasee installed anything himself.
In any case, before I found this thread, I started another topic at http://www.fordedgeforum.com/topic/17564-backup-camera-without-my-touch and wanted to cross-link them. Unfortunately,there's not much helpful information in them, except the photos from toast. The 2012 sales brochure listed the 204A option package as Leather + Backup Camera, but not MFT. So I was pretty sure it was possible to get video on the 4" lcd, but didn't have any proof. I was scouring used car listings for example photos. Thanks, toast, for helping me keep my sanity.
This weekend, if the weather holds, I'm going to pull the liftgate trim and make sure the camera is wired to something. If it is, then I think I'm on a software hunt. I imagine there's either a hidden switch in the existing software, or I'll need to flash a different version with the camera enabled.