diff --git a/virtualbox/config.sh b/virtualbox/config.sh
index d80774ccf..159970e7a 100755
--- a/virtualbox/config.sh
+++ b/virtualbox/config.sh
@@ -14,11 +14,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-# The number of nodes for installing OpenStack on
-#   - for minimal non-HA installation, specify 2 (1 controller + 1 compute)
-#   - for minimal non-HA with Cinder installation, specify 3 (1 ctrl + 1 compute + 1 cinder)
-#   - for minimal HA installation, specify 4 (3 controllers + 1 compute)
-cluster_size=5
+source functions/memory.sh
 
 # Get the first available ISO from the directory 'iso'
 iso_path=`ls -1t iso/*.iso 2>/dev/null | head -1`
@@ -39,8 +35,13 @@ idx=0
 for ip in 10.20.0.1 172.16.0.1 172.16.1.1 ; do
 # VirtualBox for Windows has different virtual NICs naming and indexing
   case "$(uname)" in
-    Linux | Darwin)
+    Linux)
       host_nic_name[$idx]=vboxnet$idx
+      os_type="linux"
+    ;;
+    Darwin)
+      host_nic_name[$idx]=vboxnet$idx
+      os_type="darwin"
     ;;
     CYGWIN*)
       if [ $idx -eq 0 ]; then
@@ -48,6 +49,7 @@ for ip in 10.20.0.1 172.16.0.1 172.16.1.1 ; do
       else
         host_nic_name[$idx]='VirtualBox Host-Only Ethernet Adapter #'$((idx+1))
       fi
+      os_type="cygwin"
     ;;
     *)
       echo "$(uname) is not supported operating system."
@@ -59,6 +61,7 @@ for ip in 10.20.0.1 172.16.0.1 172.16.1.1 ; do
   idx=$((idx+1))
 done
 
+
 # Master node settings
 vm_master_cpu_cores=1
 vm_master_memory_mb=1536
@@ -77,30 +80,93 @@ vm_master_username=root
 vm_master_password=r00tme
 vm_master_prompt='root@fuel ~]#'
 
+# The number of nodes for installing OpenStack on
+#   - for minimal non-HA installation, specify 2 (1 controller + 1 compute)
+#   - for minimal non-HA with Cinder installation, specify 3 (1 ctrl + 1 compute + 1 cinder)
+#   - for minimal HA installation, specify 4 (3 controllers + 1 compute)
+if [ "$CONFIG_FOR" = "16GB" ]; then
+  cluster_size=5
+elif [ "$CONFIG_FOR" = "8GB" ]; then
+  cluster_size=3
+elif [ "$CONFIG_FOR" = "4GB" ]; then
+  cluster_size=2
+else
+  # Section for custom configuration
+  cluster_size=3
+fi
+
 # Slave node settings. This section allows you to define CPU count for each slave node.
-vm_slave_cpu_default=1
+
 # You can specify CPU count for your nodes as you wish, but keep in mind resources of your machine.
 # If you don't, then will be used default parameter
-vm_slave_cpu[1]=1
-vm_slave_cpu[2]=1
-vm_slave_cpu[3]=1
-vm_slave_cpu[4]=1
-vm_slave_cpu[5]=1
+if [ "$CONFIG_FOR" = "16GB" ]; then
+  vm_slave_cpu_default=1
+
+  vm_slave_cpu[1]=1
+  vm_slave_cpu[2]=1
+  vm_slave_cpu[3]=1
+  vm_slave_cpu[4]=1
+  vm_slave_cpu[5]=1
+elif [ "$CONFIG_FOR" = "8GB" ]; then
+  vm_slave_cpu_default=1
+
+  vm_slave_cpu[1]=1
+  vm_slave_cpu[2]=1
+  vm_slave_cpu[3]=1
+elif [ "$CONFIG_FOR" = "4GB" ]; then
+  vm_slave_cpu_default=1
+
+  vm_slave_cpu[1]=1
+  vm_slave_cpu[2]=1
+else
+  # Section for custom configuration
+  vm_slave_cpu_default=1
+
+  vm_slave_cpu[1]=1
+  vm_slave_cpu[2]=1
+  vm_slave_cpu[3]=1
+fi
 
 # This section allows you to define RAM size in MB for each slave node.
 # Keep in mind that PXE boot might not work correctly with values lower than 768.
 # You can specify memory size for the specific slaves, other will get default vm_slave_memory_default
 # Mirantis OpenStack 3.2 controllers require 1280 MiB of RAM as absolute minimum due to Heat!
-vm_slave_memory_default=1536
+
 # You may comment out all the following memory parameters to use default value for each node.
 # It is recommended if you going to try HA configurations.
 # for controller node at least 1.5Gb is required if you also run Ceph and Heat on it
 # and for Ubuntu controller we need 2Gb of ram
-vm_slave_memory_mb[1]=2048
-vm_slave_memory_mb[2]=1024  # for compute node 1GB is recommended, otherwise VM instances in OpenStack may not boot
-vm_slave_memory_mb[3]=1024  # for dedicated Cinder, 768Mb is OK, but Ceph needs 1Gb minimum
-vm_slave_memory_mb[4]=1024
-vm_slave_memory_mb[5]=1024
+
+# For compute node 1GB is recommended, otherwise VM instances in OpenStack may not boot
+# For dedicated Cinder, 768Mb is OK, but Ceph needs 1Gb minimum
+
+if [ "$CONFIG_FOR" = "16GB" ]; then
+  vm_slave_memory_default=1536
+
+  vm_slave_memory_mb[1]=2048
+  vm_slave_memory_mb[2]=2048
+  vm_slave_memory_mb[3]=2048
+  vm_slave_memory_mb[4]=2048
+  vm_slave_memory_mb[5]=2048
+elif [ "$CONFIG_FOR" = "8GB" ]; then
+  vm_slave_memory_default=1024
+
+  vm_slave_memory_mb[1]=1536
+  vm_slave_memory_mb[2]=1536
+  vm_slave_memory_mb[3]=1536
+elif [ "$CONFIG_FOR" = "4GB" ]; then
+  vm_slave_memory_default=1024
+
+  vm_slave_memory_mb[1]=1024
+  vm_slave_memory_mb[2]=1024
+else
+  # Section for custom configuration
+  vm_slave_memory_default=1024
+
+  vm_slave_memory_mb[1]=2048
+  vm_slave_memory_mb[2]=1024
+  vm_slave_memory_mb[3]=1024
+fi
 
 # Within demo cluster created by this script, all slaves (controller
 # and compute nodes) will have identical disk configuration. Each 
@@ -112,3 +178,23 @@ vm_slave_memory_mb[5]=1024
 vm_slave_first_disk_mb=65535
 vm_slave_second_disk_mb=65535
 vm_slave_third_disk_mb=65535
+
+total_memory=$(get_available_memory $os_type)
+
+# Count selected RAM configuration
+for machine_number in $(eval echo {1..$cluster_size}); do
+  if [ -n "${vm_slave_memory_mb[$machine_number]}" ]; then
+    vm_total_mb=$(( $vm_total_mb + ${vm_slave_memory_mb[$machine_number]} ))
+  else
+    vm_total_mb=$(( $vm_total_mb + $vm_slave_memory_default ))
+  fi
+done
+vm_total_mb=$(( $vm_total_mb + $vm_master_memory_mb ))
+
+# Do not run VMs if host PC not have enough RAM
+can_allocate_mb=$(( ($total_memory - 524288) / 1024 ))
+if [ $vm_total_mb -gt $can_allocate_mb ]; then
+  echo "Your host has not enough memory."
+  echo "You can allocate no more than ${can_allocate_mb}MB, but trying to run VMs with ${vm_total_mb}MB"
+  exit 1
+fi
diff --git a/virtualbox/functions/memory.sh b/virtualbox/functions/memory.sh
new file mode 100644
index 000000000..7b3f86476
--- /dev/null
+++ b/virtualbox/functions/memory.sh
@@ -0,0 +1,56 @@
+#!/bin/bash
+
+#    Copyright 2014 Mirantis, Inc.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+# This file contains the functions to get available memory on host PC
+
+get_available_memory() {
+  os_type=$1
+  local total_memory=""
+  # Check available commands and RAM on host PC
+  if [ "$os_type" = "linux" ]; then
+    # runing on linux
+    if [ "$(which free)" != "" ]; then
+      # using free
+      total_memory=$(free | grep Mem | awk '{print $2}')
+    elif [ $(which top) != '' ]; then
+      # using top
+      total_memory=$(top -n 1 | grep "Mem:" | awk '{ print $4 }')
+    else
+      total_memory="-1"
+    fi
+  elif [ "$os_type" = "darwin" ]; then
+    # runing on mac os darwin
+    if [ "$(which sysctl)" != "" ]; then
+      # using sysctl
+      total_memory=$(sysctl -n hw.memsize)
+      total_memory=$(( $total_memory / 1024 ))
+    else
+      total_memory="-1"
+    fi
+  elif [ "$os_type" = "cygwin" ]; then
+    # runing on cygwin
+    if [ "$(which free)" != "" ]; then
+      # using free
+      total_memory=$(free | grep Mem | awk '{print $2}')
+    elif [ $(which top) != '' ]; then
+      # using top
+      total_memory=$(top -n 1 | grep "Mem:" | awk '{ print $4 }')
+    else
+      total_memory="-1"
+    fi
+  fi
+  echo $total_memory
+}
\ No newline at end of file
diff --git a/virtualbox/launch_16GB.sh b/virtualbox/launch_16GB.sh
new file mode 100755
index 000000000..03e283143
--- /dev/null
+++ b/virtualbox/launch_16GB.sh
@@ -0,0 +1,4 @@
+#!/bin/bash
+
+CONFIG_FOR="16GB" ./launch.sh
+
diff --git a/virtualbox/launch_4GB.sh b/virtualbox/launch_4GB.sh
new file mode 100755
index 000000000..ed5e184e1
--- /dev/null
+++ b/virtualbox/launch_4GB.sh
@@ -0,0 +1,4 @@
+#!/bin/bash
+
+CONFIG_FOR="4GB" ./launch.sh
+
diff --git a/virtualbox/launch_8GB.sh b/virtualbox/launch_8GB.sh
new file mode 100755
index 000000000..f32d900e7
--- /dev/null
+++ b/virtualbox/launch_8GB.sh
@@ -0,0 +1,4 @@
+#!/bin/bash
+
+CONFIG_FOR="8GB" ./launch.sh
+