The seed key alg is the same as the
pcm uses. I posted it up here. You will need to brute force the 5 byte seed key though. You should be able to read and erase/write to your hearts content if you enter the level 1 security unlock mode.
https://pcmhacking.net/forums/viewtopic.php?t=4940
The vbf format is relatively simple to unpack and repack. Your issue will be finding and checksums it needs.
I would like to do this on the mustang
icc or cluster at some point to add custom logos to it. Pm me if you are interested in looking into this, I can probably give you a helping hand on doing a full flash read of the eeprom over obd. There are a lot more f150s and mustangs than there are falcons. Could be profitable.