def METHOD_NAME(self, img):
    self.print_step("Downloading install iso")
    cimg = self._download_with_cache(self.link, sha256sum=self.csum)
    img_tmp = img + ".tmp"
    iso = img + ".install.iso"
    iso_xz = iso + ".xz"
    self.print_step("Preparing iso and disk image")
    subprocess.check_call(["cp", "-f", cimg, iso_xz])
    subprocess.check_call(["xz", "-dvf", iso_xz])
    self.exec_qemu_img("create", "-f", "qcow2", img_tmp, self.size)
    self.print_step("Booting installer")
    self.boot(img_tmp, extra_args = [
        "-bios", "pc-bios/bios-256k.bin",
        "-machine", "graphics=off",
        "-device", "VGA",
        "-cdrom", iso
    ])
    self.console_init()
    self.console_boot_serial()
    self.console_wait_send("Console type",          "xterm\n")
    # pre-install configuration
    self.console_wait_send("Welcome",               "\n")
    self.console_wait_send("Keymap Selection",      "\n")
    self.console_wait_send("Set Hostname",          "freebsd\n")
    self.console_wait_send("Distribution Select",   "\n")
    self.console_wait_send("Partitioning",          "\n")
    self.console_wait_send("Partition",             "\n")
    self.console_wait_send("Scheme",                "\n")
    self.console_wait_send("Editor",                "f")
    self.console_wait_send("Confirmation",          "c")
    self.print_step("Installation started now, this will take a while")
    # post-install configuration
    self.console_wait("New Password:")
    self.console_send("%s\n" % self._config["root_pass"])
    self.console_wait("Retype New Password:")
    self.console_send("%s\n" % self._config["root_pass"])
    self.console_wait_send("Network Configuration", "\n")
    self.console_wait_send("IPv4",                  "y")
    self.console_wait_send("DHCP",                  "y")
    self.console_wait_send("IPv6",                  "n")
    self.console_wait_send("Resolver",              "\n")
    self.console_wait_send("Time Zone Selector",    "0\n")
    self.console_wait_send("Confirmation",          "y")
    self.console_wait_send("Time & Date",           "\n")
    self.console_wait_send("Time & Date",           "\n")
    self.console_wait_send("System Configuration",  "\n")
    self.console_wait_send("System Hardening",      "\n")
    # qemu user
    self.console_wait_send("Add User Accounts", "y")
    self.console_wait("Username")
    self.console_send("%s\n" % self._config["guest_user"])
    self.console_wait("Full name")
    self.console_send("%s\n" % self._config["guest_user"])
    self.console_wait_send("Uid",                   "\n")
    self.console_wait_send("Login group",           "\n")
    self.console_wait_send("Login group",           "\n")
    self.console_wait_send("Login class",           "\n")
    self.console_wait_send("Shell",                 "\n")
    self.console_wait_send("Home directory",        "\n")
    self.console_wait_send("Home directory perm",   "\n")
    self.console_wait_send("Use password",          "\n")
    self.console_wait_send("Use an empty password", "\n")
    self.console_wait_send("Use a random password", "\n")
    self.console_wait("Enter password:")
    self.console_send("%s\n" % self._config["guest_pass"])
    self.console_wait("Enter password again:")
    self.console_send("%s\n" % self._config["guest_pass"])
    self.console_wait_send("Lock out",              "\n")
    self.console_wait_send("OK",                    "yes\n")
    self.console_wait_send("Add another user",      "no\n")
    self.console_wait_send("Final Configuration",   "\n")
    self.console_wait_send("Manual Configuration",  "\n")
    self.console_wait_send("Complete",              "\n")
    self.print_step("Installation finished, rebooting")
    self.console_boot_serial()
    # setup qemu user
    prompt = "$"
    self.console_ssh_init(prompt, self._config["guest_user"], self._config["guest_pass"])
    self.console_wait_send(prompt, "exit\n")
    # setup root user
    prompt = "root@freebsd:~ #"
    self.console_ssh_init(prompt, "root", self._config["root_pass"])
    self.console_sshd_config(prompt)
    # setup serial console
    self.console_wait(prompt)
    self.console_send("echo 'console=comconsole' >> /boot/loader.conf\n")
    # setup boot delay
    self.console_wait(prompt)
    self.console_send("echo 'autoboot_delay=1' >> /boot/loader.conf\n")
    # setup virtio-blk #1 (tarfile)
    self.console_wait(prompt)
    self.console_send("echo 'chmod 666 /dev/vtbd1' >> /etc/rc.local\n")
    self.print_step("Configuration finished, rebooting")
    self.console_wait_send(prompt, "reboot\n")
    self.console_wait("login:")
    self.wait_ssh()
    self.print_step("Installing packages")
    self.ssh_root_check("pkg install -y %s\n" % " ".join(self.pkgs))
    # shutdown
    self.ssh_root(self.poweroff)
    self.console_wait("Uptime:")
    self.wait()
    if os.path.exists(img):
        os.remove(img)
    os.rename(img_tmp, img)
    os.remove(iso)
    self.print_step("All done")