IMO you're barking up the wrong tree, I would go with PHR advise. To get a more precise tune, you'll have to actually tune it on your car. I wouldn't even go hammer too hard on the car until it is tuned. So the base tune is as close as you're likely to get out of the box.
BTW, I'm installing the PHR Stg1 now, but with their Stg2 fuel system w/twin Densos.