iCubed/Acorn AEH78E - Reflasing

I have a AEH78E which I can’t update in situ as I assume it’s fitted with the 27C020 eprom ic. How do I go about flashing this card with the updated driver?

I have the AT29C020 and I can write an image to it but I’m guessing it’s not as simple as flashing the romimage6 (which is the image !EthLanPrg attempted to flash) to the AT29C020 and swapping out the 27C020? Apart from anything else, romimage6 is 97K as opposed to 256K which was read out of the 27C020.

Is the romimage6 flashed at an offset? I thought I might spot the hardware address in the current IC’s contents but I didn’t.

Anybody any ideas?