I threw this program together because I was sick of using a hex editor to turn off error flags and recalc the checksum in 747 bins when doing tbi retrofits on non GM engines. I'm too cheap to buy tunercat so this is the result

It is not so userfriendly right now, but I'm working on it.

let me know what you think.

Its up at http://www.utdallas.edu/~rsf031000/bin/747edit/

runs in a win32 console as 747edit.exe binfile.bin