XBee Newbie needs help getting started

EXCELLENT, Jack! Now if you can just tell me how to read the transmission back into an array, and then back into the myNumber.UL, I may be in business!
Would it be something like:

    for (int x = 0; x < 5; x++)
    {
      myNumber.B = Serial.read();

}

or maybe it's a "Stream.read"?

I did confirm that the IRsend.sendNEC will take the myNumber.UL as an argument, and the signal pattern looks just fine, so this may be the last piece!
That's a cool terminal program you have. What is it?