It's the BCM calibration file, not the ECM, EFILive can't do it. A Tech2 with TIS2000 can though. You tell it you replaced the BCM, tell it the VIN number is wrong, type in the bogus VIN number, and flash it. It will over-write whatever was in the BCM.
DOH!! You just want a USA 6698 vin #?
Do you have this TIS2000 Tech 2 Pat? If so, maybe we can try it when I come down in May.
Actually, Mike L. might be able to do this as well no? He needs to hook the tech 2 up after the trans build anyhow.