I also have another question, as I don't want to have any doubt in the process of the flash.

It says I need to flash the rootfs firstly, I assume this means flash the firmware and re-install. But it also says DO NOT boot up Maemo inbetween flashing the rootfs and the eMMC. How is this possible? I was under the impression from previous rootfs flashing that the phone automatically reboots once the firmware is updated?