Updating the board with a Atmega2560

Hi,

I got an old mightyboard that was a bit broken, repaired it and replaced the Atmega1280 cpu with a larger Atmega2560 as some sailfish features are suposedly only available for this one.
Now i did not found any instruction how to firmware on properly.
I got a boot loader installed and I can upload Atmega2560firmwares form replicator G but non is specifyed to be the right one for the CTC printer.
So which one should I take? Also what stuff do I need to put into the EEPROM, as its a new chip its obviously empty.

Any advice would be greatly appreciated.

Not sure, but I am guessing that once you download all the latest firmwares from jetty using repg, you install the Makerbot Replicator 1 with ATmega 2560.

Ok, and what about the eeprom is ther some guidefor this update procedure?