I have a Predator with latest software update and an 04 Cummins. Which tune will give me the best MPG?

I have a Predator 7130. If I want to download the latest update, does it contain info from all of the previous earlier dated updates, or do I need to download the earlier updates first to get all of the info?

ropnjessi wrote: The main thing I would be concerned with is your transmission.

Yep. I hope I'll be happy with the "Tow Tune" I promise not to do any boosted launches and such.

I also have a Quadzilla boost fooler and an adjustable boost elbow that I have never used. Would they help used with the Predator?

I am buying a used Predator for my 04 Dodge. Should I download the latest update before programming my truck? Do the updates contain all the info from all of the earlier updates? In example: revision 10 includes revision 1,2,3,4...... 10.
Which tune will give me the best fuel mileage?
Also, is there ...