Forscan is a software scannerfor Ford, Mazda, Lincoln and Mercury vehicles. I used it to enable the reverse camera on my Mustang when I installed the NAV unit. Here are some helpful links.
Standard and Extended licenses for Windows
Helpful links on As Built configuration and programming
Adding the OEM nav
In particular, for enabling the reverse camera, I used Forscan, accessed the ACM and changed the code from 80 to 90.