Well since I have been unsuccessful in this thread, I might have to take a few risky steps to move forward. I've been searching through what scarce information I've been able to find on other forums, and I'm fairly confident that the files I currently have loaded on my IPC aren't available through the Ford site because they've been superseded by newer ones, and this goes for the BU firmware as well.
After reading through the 2016 thread at Focusfanatics
here, I am considering trying to flash the following combination:
BM5T-14C026-ACC — Pictures / Sounds / Quad Layout
BM5T-14C026-BBB - Base Firmware
BM5T-14C026-AKC - Calibration / EEPROM (US version)
All of these are still readily downloadable from Ford.
There was also mention of flashing CM5T-14C318-AD for some sort of signal calibration. The non-ST folks had done some experimentation to get their speedometers to read accurately and I have never seen anything ST-specific in those conversations and whether that affects which calibration file to select. I noticed in our epic FoCCCus thread that
@jdub1981 had CM5T-14C318-AC in his early 2013 build, making me wonder if this could be ST-specific for the pre-facelift 160mph cluster (as opposed to the 150mph cluster found in Non-ST pre-facelift models).
My second concern with following the flashing solution of the non-ST guys is the presence of the ST logo in the IPC screen before startup, which is something I would like to have. I have a theory that these graphics may be included in the updated pictures file (ACC) and the file is universal to all models, but the logo is only triggered if the BCM or Sync APIM tells the IPC that it's an ST (similar to how late SYNC 3 versions have the graphics for multiple splash screens in memory, Ford Lincoln, ST Performance, etc., and a simple hex code determines which one is used), but that's just a shot in the dark theory on my part.
So that's the direction I'm leaning toward: using ACC, BBB, AKC, and maybe one of the calibration files.
@sdgros01 , are you still able to check at work what the true latest files should be for my 2013 ST?