2 way controls are better known as Bi-Directional control. Since the engine, trans and Antilock Braking System(ABS) are controlled by the same controller, its called a VCM(Vehicle Control Module). As such if you have a Scan Tool, such as your friends Tech 2, you can do work on your brake system, then use the scan tool to activate the ABS motor in order to clear it of air.
You can activate any electric or aux fans to ensure they are wired correctly
You can engage and lock an electric trans in any gear you wish, as well as toggle the TCC(torque Converter Clutch)

And perform a CASE relearn (CASE=Crankshaft Angle Sensor Error) CASE relearns allow the VCM to accurately detect misfires after a new engine, different crank, new crank reluctor are installed into the truck.

Is there no way to tune with EFILive without buying the V9? I thought you could use a V7 or something like that and only need the V9 for the ability to flash a PCM?

Are you sure that they weren't asking for the number of your Roadrunner so that you could apply the EFILive/Roadrunner license?

peace
Hog