You essentially plug in some vita info regarding your car (weight, tire size, gear ratios, etc) along with the exported data, and it will plot a dyno chart for the car.
Significant testing has been done with this program in the Evo world, so I put it to the test tonight on my Z since the AEM can export to text. I went out and did a 3rd gear pull....plugged the numbers in, and here's what we got...
The program is pretty in-depth, but I can provide some guidance/direction for anyone who wants to give it a shot....The BONUS is that the program is entirely freeware, I plan on donating to the guy that put it together
FWIW the car dyno'd 718/586 on a mustang dyno before I dialed out a degree of timing for safety's sake