There is a way to extract content from RX-51_2009SE_1.2009.41-1.VANILLA_PR_EMMC_MR0_ARM.bin without reflash eMMC?
$ flasher-3.5 -F RX-51_2009SE_1.2009.41-1.VANILLA_PR_EMMC_MR0_ARM.bin -u $ mkdir emmc # mount -t vfat -o loop mmc emmc/