Opel Combo C 1.3 CDTi EGR OFF and a little more power

[LuisWRX]

Hello Guys.

Recently i bought Kess for disable EGR and put a little more power on my both Opel cars, Combo C 1.3 CDTi 75HP from 2007 and Corsa C 1.3 CDTi 70HP from 2003.

I download ECU files with KESS from both cars, i used EGR off program in both ecu files to disable EGR, but after disable it program say " Remember to fixed Checksum" and i do a search about checksum and my ECU file with EGR off has diferent Checksum

Im noob but i trie change with winols, ecm titanium and no one help, watch some videos and nothing help.

Its possible someone help me put EGR off in both cars ?

I attach the original files

Thanks to all