This is a little program that I wrote in 3 days to edit GM's 12228746 bin files. I had some hard time doing an ECU file that would work with the existing editors, so I just write my own program to work on my old laptop also. The program is on the early stage and I don't yet if I'll add some additional features (depends on available time). So, in the mean time, I make it available so that others may try it, or even create a functional ECU file for the 1228746 ECM. The ECM's addresses hasn't all been verified. But, until now seems to work. To get around, you must have the program files in the same directory as your bin files. - GM8746.EXE - GM8746.CFG To edit a value, you use + / - to add / substract from the HEX value, it automaticaly updates the "converted" value on the screen. You can also multiply or divide by a certain factor using * or /. Again, it uses the HEX value as the main variable. The checksum is automaticaly updated upon the save command initiated. Feedback at chevy89@usa.net as usual, DISCLAIMER: For EDUCATIONAL PURPOSES only. NOT RESPONSIBLE FOR ANY DAMAGES RESULTING DIRECTLY OR INDIRECTLY FROM USING THIS PROGRAM. USE AT YOUR OWN RISK.