diff --git a/tools/boot/rootgen.sh b/tools/boot/rootgen.sh
new file mode 100755
index 00000000000..42aa4013b07
--- /dev/null
+++ b/tools/boot/rootgen.sh
@@ -0,0 +1,213 @@
+#!/bin/sh
+
+# $FreeBSD$
+
+#
+# Builds all the bat-shit crazy combinations we support booting from,
+# at least for amd64. It assume you have a ~sane kernel in /boot/kernel
+# and copies that into the ~150MB root images we create (we create the du
+# size of the kernel + 20MB
+#
+# Sad panda sez: this runs as root, but could be userland if someone
+# creates userland geli and zfs tools.
+#
+# This assumes an external prograam install-boot.sh which will install
+# the appropriate boot files in the appropriate locations.
+#
+# These images assume ada0 will be the root image. We should likely
+# use labels, but we don't.
+#
+# ASsumes you've already rebuilt... maybe bad? Also maybe bad: the env
+# vars should likely be conditionally set to allow better automation.
+#
+
+cpsys() {
+    src=$1
+    dst=$2
+
+    # Copy kernel + boot loader
+    (cd $src ; tar cf - .) | (cd $dst; tar xf -)
+}
+
+mk_nogeli_gpt_ufs_legacy() {
+    src=$1
+    img=$2
+
+    rm -f ${img} ${img}.p2
+    makefs -t ffs -B little -s 200m ${img}.p2 ${src}
+    mkimg -s gpt -b ${src}/boot/pmbr \
+	  -p freebsd-boot:=${src}/boot/gptboot \
+	  -p freebsd-ufs:=${img}.p2 -o ${img}
+}
+
+mk_nogeli_gpt_ufs_uefi() {
+    src=$1
+    img=$2
+
+    rm -f ${img} ${img}.p2
+    makefs -t ffs -B little -s 200m ${img}.p2 ${src}
+    mkimg -s gpt -b ${src}/boot/pmbr \
+	  -p freebsd-boot:=${src}/boot/gptboot \
+	  -p freebsd-ufs:=${img}.p2 -o ${img}
+}
+
+mk_nogeli_gpt_ufs_both() {
+    src=$1
+    img=$2
+
+    makefs -t ffs -B little -s 200m ${img}.p3 ${src}
+    # p1 is boot for uefi, p2 is boot for gpt, p3 is /
+    mkimg -b ${src}/boot/pmbr -s gpt \
+	  -p efi:=${src}/boot/boot1.efifat \
+	  -p freebsd-boot:=${src}/boot/gptboot \
+	  -p freebsd-ufs:=${img}.p3 \
+	  -o ${img}
+}
+
+mk_nogeli_gpt_zfs_legacy() {
+    src=$1
+    img=$2
+    mntpt=$3
+    geli=$4
+    scheme=$5
+    fs=$6
+    bios=$7
+    pool=nogeli-gpt-zfs-legacy
+
+    rm -f ${img}
+    dd if=/dev/zero of=${img} count=1 seek=$((200 * 1024 * 1024 / 512))
+    md=$(mdconfig -f ${img})
+    gpart create -s gpt ${md}
+    gpart add -t freebsd-boot -s 400k -a 4k	${md}	# <= ~540k
+    gpart add -t freebsd-zfs -l root $md
+    # install-boot will make this bootable
+    zpool create -O mountpoint=none -R ${mntpt} ${pool} ${md}p2
+    zpool set bootfs=${pool} ${pool}
+    zfs create -o mountpoint=/ ${pool}/ROOT
+    # NB: The online guides go nuts customizing /var and other mountpoints here, no need
+    cpsys ${src} ${mntpt}
+    df
+    # need to make a couple of tweaks
+    cat > ${mntpt}/boot/loader.conf <<EOF
+zfs_load=YES
+opensolaris_load=YES
+EOF
+    cp /boot/kernel/zfs.ko ${mntpt}/boot/kernel/zfs.ko
+    cp /boot/kernel/opensolaris.ko ${mntpt}/boot/kernel/opensolaris.ko
+    # end tweaks
+    zfs umount -f ${pool}/ROOT
+    zfs set mountpoint=none ${pool}/ROOT
+    zpool set bootfs=${pool}/ROOT ${pool}
+    zpool set autoexpand=on ${pool}
+    zpool export ${pool}
+    ${SRCTOP}/tools/boot/install-boot.sh -g ${geli} -s ${scheme} -f ${fs} -b ${bios} -d ${src} ${md}
+    mdconfig -d -u ${md}
+}
+
+mk_nogeli_gpt_zfs_uefi() {
+}
+
+mk_nogeli_gpt_zfs_both() {
+}
+
+mk_nogeli_mbr_ufs_legacy() {
+}
+
+mk_nogeli_mbr_ufs_uefi() {
+}
+
+mk_nogeli_mbr_ufs_both() {
+}
+
+mk_nogeli_mbr_zfs_legacy() {
+}
+
+mk_nogeli_mbr_zfs_uefi() {
+}
+
+mk_nogeli_mbr_zfs_both() {
+}
+
+mk_geli_gpt_ufs_legacy() {
+}
+
+mk_geli_gpt_ufs_uefi() {
+}
+
+mk_geli_gpt_ufs_both() {
+}
+
+mk_geli_gpt_zfs_legacy() {
+}
+
+mk_geli_gpt_zfs_uefi() {
+}
+
+mk_geli_gpt_zfs_both() {
+}
+
+mk_geli_mbr_ufs_legacy() {
+}
+
+mk_geli_mbr_ufs_uefi() {
+}
+
+mk_geli_mbr_ufs_both() {
+}
+
+mk_geli_mbr_zfs_legacy() {
+}
+
+mk_geli_mbr_zfs_uefi() {
+}
+
+mk_geli_mbr_zfs_both() {
+}
+
+# iso
+# pxeldr
+# u-boot
+
+# Misc variables
+SRCTOP=$(make -v SRCTOP)
+cd ${SRCTOP}/stand
+OBJDIR=$(make -v .OBJDIR)
+IMGDIR=${OBJDIR}/boot-images
+mkdir -p ${IMGDIR}
+MNTPT=$(mktemp -d /tmp/stand-test.XXXXXX)
+
+# Setup the installed tree...
+DESTDIR=${OBJDIR}/boot-tree
+rm -rf ${DESTDIR}
+mkdir -p ${DESTDIR}/boot/defaults
+mkdir -p ${DESTDIR}/boot/kernel
+cp /boot/kernel/kernel ${DESTDIR}/boot/kernel
+echo -D -S115200 > ${DESTDIR}/boot.config
+# XXX
+cp /boot/device.hints ${DESTDIR}/boot/device.hints
+# Assume we're already built
+make install DESTDIR=${DESTDIR} MK_MAN=no MK_INSTALL_AS_USER=yes
+# Copy init, /bin/sh and minimal libraries
+mkdir -p ${DESTDIR}/sbin ${DESTDIR}/bin ${DESTDIR}/lib ${DESTDIR}/libexec
+for f in /sbin/init /bin/sh $(ldd /bin/sh | awk 'NF == 4 { print $3; }') /libexec/ld-elf.so.1; do
+    cp $f ${DESTDIR}/$f
+done
+mkdir ${DESTDIR}/dev
+
+# OK. Let the games begin
+
+for geli in nogeli geli; do
+    for scheme in gpt mbr; do
+	for fs in ufs zfs; do
+	    for bios in legacy uefi both; do
+		# Create sparse file and mount newly created filesystem(s) on it
+		img=${IMGDIR}/${geli}-${scheme}-${fs}-${bios}.img
+		echo "vvvvvvvvvvvvvvvvvvvvvv   Creating $img  vvvvvvvvvvvvvvvvvvvvvvv"
+		eval mk_${geli}_${scheme}_${fs}_${bios} ${DESTDIR} ${img} ${MNTPT} ${geli} ${scheme} ${fs} ${bios}
+		echo "^^^^^^^^^^^^^^^^^^^^^^   Creating $img  ^^^^^^^^^^^^^^^^^^^^^^^"
+	    done
+	done
+    done
+done
+
+rmdir ${MNTPT}