To create a .cax to accomplish what you're trying to do, you'll need:
1) JTAG equipment to obtain a straight binary/*.bin file from your ECM -~$10k
2) Hex editor software - free to $1k
3) Intimate knowledge as to how the ECM code functions and where the functions you're trying to map out are -priceless

The LS1 one will not work at all, the ECMs are made by completely different companies with completely different coding strategies. It is a good place to see how the .cax file format works, but the locations/offsets/units/etc aren't applicable to your Cummins.

Hate to say it, but this is why the *big* tuners can charge whatever they'd like for a delete, they've invested the time, money, and hundreds of hours into tracking down the code and building it out.