diff --git a/installers/install_osm.sh b/installers/install_osm.sh
index f007bd9..a70b05e 100755
--- a/installers/install_osm.sh
+++ b/installers/install_osm.sh
@@ -13,12 +13,13 @@
 #   limitations under the License.
 #
 REPOSITORY_BASE=https://osm-download.etsi.org/repository/osm/debian
-RELEASE=ReleaseSIXTEEN
+RELEASE=ReleaseEIGHTEEN
 REPOSITORY=stable
 DOCKER_TAG="testing-daily"
 DEVOPS_PATH=/usr/share/osm-devops
 
 function usage(){
+    [ -z "${DEBUG_INSTALL}" ] || DEBUG beginning of function
     echo -e "usage: $0 [OPTIONS]"
     echo -e "Install OSM"
     echo -e "  OPTIONS"
@@ -36,16 +37,16 @@
     echo -e "     -O <KUBECONFIG_FILE>: Kubeconfig of an existing cluster to be used as OSM cluster instead of creating a new one from scratch"
     echo -e "     --no-mgmt-cluster: Do not provision a mgmt cluster for cloud-native gitops operations in OSM (NEW in Release SIXTEEN) (by default, it is installed)"
     echo -e "     --no-aux-cluster: Do not provision an auxiliary cluster for cloud-native gitops operations in OSM (NEW in Release SIXTEEN) (by default, it is installed)"
-    echo -e "     -D <devops path>:   use local devops installation path"
-    echo -e "     -s <namespace>  namespace when installed using k8s, default is osm"
-    echo -e "     -w <work dir>:   Location to store runtime installation"
-    echo -e "     -K:             Specifies the name of the controller to use - The controller must be already bootstrapped"
+    echo -e "     -s <namespace>  namespace where OSM helm chart will be deployed (default is osm)"
     echo -e "     -d <docker registry URL> use docker registry URL instead of dockerhub"
     echo -e "     -p <docker proxy URL> set docker proxy URL as part of docker CE configuration"
     echo -e "     -m <MODULE>:    module to test a specific docker image (NG-UI, NBI, LCM, RO, MON) (can be used several times)"
     echo -e "     -T <docker tag> use specific docker tag for the module specified with option -m"
+    echo -e "     -U <docker user>: specify docker user to use when pulling images from a private registry"
+    echo -e "     -D <devops path>: use particular devops installation path"
+    echo -e "     -e <external IP>: set the external IP address of the OSM cluster (default is empty, which means autodetect)"
     echo -e "     --debug:        debug mode"
-    echo -e "     --uninstall:    uninstall OSM: remove the containers and delete NAT rules"
+    [ -z "${DEBUG_INSTALL}" ] || DEBUG end of function
 }
 
 add_repo() {