I did all the previous steps. Now I'm trying to flash the dualboot kernel. The problem is shown in the first post after I try flashing.
DFL61_HARMATTAN_40.2012.21-3_PR_LE GACY_005-OEM1-958_ARM.bin
rootfs.bin
flasher -a rootfs.bin -k zImage.pr13 --flash-only=kernel --suppress-warranty-warning -f