I know for a fact back in 2003, you were able to send in your old RC to InnovationFIRST and they would do an update for you. I'm not sure if they offered this service this year, but I think its worth asking them about.

We sent in our 02 controller to IFI and they updated it to the 2003 specs just for practicing...obviously since thye are different setups in 03/04 you wouldnt be able to use it competition wise