ECU is a ME7.1.1 out of a 2001 A8L 4.2L

I've done a load of reading on NefMoto and believe I did this right to disable the immo. The file is only 1kb so none of the tools I've found will auto correct cks. Is the cks I need to alter located at 1E/2E(11/10) or 1F/2F(FD/FD)?

I've attached a pic of the mod along with actual ori and mod eeprom files

Summary: I changed 0x12 and 0x22 from 01 to 02..can someone confirm this is this correct? And for the cks (providing I knew the location), do I just increase the remainder value by 1 for each line?

00010: 05   01   02   00   3F   D9   00   00   00   00   69   C1   00   A5   11   FD
00020: 05   01   02   00   3F   D9   00   00   00   00   69   C1   00   A5   10   FD

Thank you!

I increased lot by 1 per line (going from 01 to 02 for 0x12 and 0x22, which disables immo), you then need to minus value of 1 from the hex located at 0x1E and 0x2E(this corrects the cks)?