Peugeot Boxer 2.8HDi 2003 Immo Off and Checksum

[Anzelmas]

Hi, m8s!
Help me, please, to calculate checksum. I have made Immo off from original damp, but don't know how to calculate checksum :(
AM29F400BT original and fixed dumps in archive.
Thanks!

416412

[vlaki electric]

here is dtc off and cheksum on your file... pass in pm
416417