Doug,
If you are doing the upgrade yourself, BUY the boards and what you need from Boxcar Bill off his website. Excellent service and REALLY fast delivery.
Also, I believe he does the upgrade work as well if you are not sure of how to do it. He did not do mine but from speaking to Bill on the phone, he is very knowledgable about command control, etc.
Anyone else here contemplating on parts and/or upgrades, I highly recommend using Bill.