To create a bootable image for a generic Allwinner SOC based device just run the create_raw_image script, you will be prompted for aessary details. Just for convenience I've also bundled a custom slackware ARM 14 miniroot with just a few extra packahes that I find handy. If you prefer you may use any other slackware miniroot tarball. Along with the miniroot image you will need the custom_hwpack tarball: it contains all the vitals for booting most supported boards.