diff --git a/build_library/qemu_template.sh b/build_library/qemu_template.sh
index f4b51e722f..7d5b352e36 100755
--- a/build_library/qemu_template.sh
+++ b/build_library/qemu_template.sh
@@ -7,6 +7,7 @@ VM_IMAGE=
 VM_KERNEL=
 VM_INITRD=
 VM_MEMORY=
+VM_CDROM=
 VM_NCPUS="`grep -c ^processor /proc/cpuinfo`"
 SSH_PORT=2222
 SSH_KEYS=""
@@ -102,6 +103,10 @@ if [ -n "${VM_UUID}" ]; then
     set -- -uuid "$VM_UUID" "$@"
 fi
 
+if [ -n "${VM_CDROM}" ]; then
+    set -- -cdrom "$VM_CDROM" "$@"
+fi
+
 # Default to KVM, fall back on full emulation
 # ${METADATA} will be mounted in CoreOS as /media/metadata
 qemu-system-x86_64 \
diff --git a/build_library/vm_image_util.sh b/build_library/vm_image_util.sh
index c2f66c8730..5cfb98e5e4 100644
--- a/build_library/vm_image_util.sh
+++ b/build_library/vm_image_util.sh
@@ -8,6 +8,7 @@
 VALID_IMG_TYPES=(
     ami
     pxe
+    iso
     openstack
     qemu
     qemu_no_kexec
@@ -117,6 +118,11 @@ IMG_pxe_DISK_FORMAT=cpio
 IMG_pxe_PARTITIONED_IMG=0
 IMG_pxe_CONF_FORMAT=pxe
 
+## pxe, which is an cpio image
+IMG_iso_DISK_FORMAT=iso
+IMG_iso_PARTITIONED_IMG=0
+IMG_iso_CONF_FORMAT=iso
+
 ## gce, image tarball
 IMG_gce_DISK_LAYOUT=vm
 IMG_gce_CONF_FORMAT=gce
@@ -355,6 +361,39 @@ EOF
     VM_GENERATED_FILES+=( "${dst_dir}/${vmlinuz_name}" )
 }
 
+_write_iso_disk() {
+    local iso_target="${VM_TMP_DIR}/rootiso"
+    local dst_dir=$(_dst_dir)
+    local vmlinuz_name="$(_dst_name ".vmlinuz")"
+    _write_cpio_disk $@
+    VM_GENERATED_FILES=
+
+    mkdir ${iso_target}
+    pushd "${iso_target}" >/dev/null
+    mkdir isolinux syslinux coreos
+    mv $2 coreos/cpio.gz
+    mv "${dst_dir}/${vmlinuz_name}" coreos/vmlinuz
+    #for file in chain.c32 libcom32.c32 libutil.c32 memdisk; do
+    #for file in isolinux.bin ldlinux.c32; do
+    cp -R /usr/share/syslinux/* isolinux/
+    cat<<EOF > isolinux/isolinux.cfg
+INCLUDE /syslinux/syslinux.cfg
+EOF
+    cat<<EOF > syslinux/syslinux.cfg
+default coreos
+prompt 0
+timeout 15
+
+label coreos
+  menu default
+  kernel /coreos/vmlinuz
+  append initrd=/coreos/cpio.gz coreos.autologin
+EOF
+    mkisofs -v -l -r -J -o $2 -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table .
+    isohybrid $2
+    popd >/dev/null
+}
+
 # If a config format is defined write it!
 write_vm_conf() {
     local conf_format=$(_get_vm_opt CONF_FORMAT)
@@ -420,6 +459,13 @@ When using -nographic or -serial you must also enable the serial console:
 EOF
 }
 
+_write_iso_conf() {
+    local script="$(_dst_dir)/$(_dst_name ".sh")"
+    local dst_name=$(basename "$VM_DST_IMG")
+    _write_qemu_common "${script}"
+    sed -e "s%^VM_CDROM=.*%VM_CDROM='${dst_name}'%" -i "${script}"
+}
+
 # Generate the vmware config file
 # A good reference doc: http://www.sanbarrow.com/vmx.html
 _write_vmx_conf() {