@RB
It's not the learning curve that worries me. It is the forgetting curve. Mine seems to be very steep. I had everything downloaded to my Cleveland PC yesterday and thought I had moved it to a USB stick. No such luck. I just forgot the critical step. So, today, I will try that table. Just looking at the size and hex, I think it will work fine.
As for serial communications, I had that working last year with some routines from Mike K8LH and Pommie. It is "just" a matter of getting the XBee to work with them.
John