AutoEnginuity is a great tool, but make sure that your truck is covered.
Ford support is listed here:
http://www.autoenginuity.com/products-software.html#EI01
It doesn't cover "Heavy Duty" trucks, such as the F-450 and up.
This is a top notch product and I use it on my 6.0L but I do need to make a correction with the last part of your statement. It covers all Superdutys including the F450 and the F550 with the 7.3, 6.0, 6.4L powerstroke. Most F450s have a 13.500 gvrw which puts it into the light duty area but select few are over 14.000 as well as the F550. Over 14.000 GVRW is considered to be medium duty trucks.
The Class 3 truck gross vehicle weight rating (GVWR) ranges from 10,001 to 14,000 pounds (4,536 to 6,350 kg). Examples of vehicles in this class include the Dodge Ram 3500, Ford F-350 and the GMC Sierra 3500, both dual rear wheel and single rear wheel. The Hummer H1 is another example of a single rear wheel Class 3 truck, with a GVWR of 10,300 lbs.
Class 4 truck gross vehicle weight rating (GVWR) ranges from 14,001 to 16,000 pounds (6,351 to 7,257 kg). Examples of vehicles in this class include select Ford F-450 trucks and the GMC 4500.
Class 5 truck gross vehicle weight rating (GVWR) ranges from 16,001 to 19,500 pounds (7,258 to 8,845 kg). Examples of trucks in this class include the International MXT, GMC 5500. and the Ford F-550.
The F250s all the way to the F550s use the same OBII port computer system. The F650 and F750 use the 6 or 9 pin round connector interface.