My GBUE Digital Package arrived late yesterday and I've had a chance to test it with my two flash carts. A bin2rom conversion of the provided bin and cfg files does not work with the Cuttle Cart 3 (no huge surprise), but a bin2ecs conversion with the J flag activated does work with the BackBit Pro. It showed all the graphics, played all the audio, allowed me to input my name and account code, and allowed me to select my vehicle, add accessories, and capture my first ghost. I do not have an ECS to test its features, but I'm optimistic it should work.