yankee flyer:
OK guys please pardon what are probably dumb questions, But?
There are no dumb questions.
yankee flyer:
On my power cab, I need an adapter (what name?), a USB cable, and computer with program installed right? Any thing else?
See Randy's post for a link to the NCE USB adapter. You'll also have to supply your own Type A to Type B USB cable.
Also, keep in mind that the NCE USB adapter will be considered the 2nd throttle that the Power cab can accept.
yankee flyer:
Is there more than one, Decoder Pro type program that you can use?
Probably, but personally I've been so satisfied with Decoder Pro that I haven't bothered to look into any.
yankee flyer:
Do I still have to put the two locos on the track and keep trying CV values until they perform alike or does the computer help in someway? I guess I don't understand the real value of the computer assist.
Well, yeah, sorta. But that's where Decoder Pro comes in. It calculates all the necessary CV values and writes them to the decoder faster than you can. And if you save the roster entry at the "right" times you also have a backup in case an adjustment doesn't work out right and you have to fall back.
Here's a link to a method that uses Decoder Pro and doesn't require any timed section, detectors, etc. You basically have the loco being adjusted chase your benchmark loco, and you adjust the "chaser" as necessary. A circle of snap-track works very well for this:
http://jmri.sourceforge.net/help/en/html/tools/speedometer/SpeedMatch.shtml
yankee flyer:
Any help is appreciated. 
Lee
HTH,
Steve