I am not sure what you mean... the ROM and internal flash drive are two different things. Did you delete the MioMap files? what happens when you turn on the device, does it load as normal and just don;t work when you hit the MioMap button? I ask because the advice I can give is dependant on exactly what is missing from your device. I have a h610 unlocked running igo8. Let me know what is going on with your h610 and I will try to help.