diff --git a/src/im_mad/im_ssh/one_im_ssh.rb b/src/im_mad/im_ssh/one_im_ssh.rb
index dcaa1b0108..84e34b2788 100755
--- a/src/im_mad/im_ssh/one_im_ssh.rb
+++ b/src/im_mad/im_ssh/one_im_ssh.rb
@@ -38,8 +38,12 @@ require 'getoptlong'
 class InformationManagerDriverSSH < OpenNebulaDriver
 
     # Init the driver
-    def initialize(hypervisor, threads, retries, local_actions)
-        super(threads, true, retries, 'im', local_actions)
+    def initialize(hypervisor, options)
+        @options={
+            :threaded => true
+        }.merge!(options)
+        
+        super('im', @options)
 
         @hypervisor = hypervisor
 
diff --git a/src/mad/ruby/OpenNebulaDriver.rb b/src/mad/ruby/OpenNebulaDriver.rb
index 72dec8864f..be559befdd 100644
--- a/src/mad/ruby/OpenNebulaDriver.rb
+++ b/src/mad/ruby/OpenNebulaDriver.rb
@@ -67,18 +67,36 @@ class OpenNebulaDriver < ActionManager
         :failure => "FAILURE"
     }
 
-    def initialize(concurrency=10, threaded=true, retries=0,
-                directory='subsystem', local_actions={})
-        super(concurrency, threaded)
+    # Initialize OpenNebulaDriver object
+    #
+    # @param [String] directory path inside the remotes directory where the
+    #   scripts are located
+    # @param [Hash] options named options to change the object's behaviour
+    # @option options [Number] :concurrency (10) max number of threads
+    # @option options [Boolean] :threaded (true) enables or disables threads
+    # @option options [Number] :retries (0) number of retries to copy scripts
+    #   to the remote host
+    # @option options [Hash] :local_actions ({}) hash with the actions
+    #   executed locally and the name of the script if it differs from the
+    #   default one. This hash can be constructed using {parse_actions_list}
+    def initialize(directory, options={})
+        @options={
+            :concurrency => 10,
+            :threaded => true,
+            :retries => 0,
+            :local_actions => {}
+        }.merge!(options)
+        
+        super(@options[:concurrency], @options[:threaded])
 
-        @retries = retries
+        @retries = @options[:retries]
         @send_mutex=Mutex.new
-        @local_actions=local_actions
+        @local_actions=@options[:local_actions]
 
         # set default values
         @config = read_configuration
         @remote_scripts_base_path=@config['SCRIPTS_REMOTE_DIR']
-        if ONE_LOCATION == nil
+        if ENV['ONE_LOCATION'] == nil
             @local_scripts_base_path = "/var/lib/one/remotes"
         else
             @local_scripts_base_path = "#{ENV['ONE_LOCATION']}/var/remotes"
diff --git a/src/mad/ruby/VirtualMachineDriver.rb b/src/mad/ruby/VirtualMachineDriver.rb
index 6992746c31..a2aefd40dc 100644
--- a/src/mad/ruby/VirtualMachineDriver.rb
+++ b/src/mad/ruby/VirtualMachineDriver.rb
@@ -61,10 +61,19 @@ class VirtualMachineDriver < OpenNebulaDriver
 
     HOST_ARG = 1
 
-    # Register default actions for the protocol
-    def initialize(concurrency=10, threaded=true, retries=0,
-                directory='vmm', local_actions={})
-        super(concurrency, threaded, retries, directory, local_actions)
+    # Register default actions for the protocol.
+    #
+    # @param [String] directory path inside remotes path where the scripts
+    #   reside
+    # @param [Hash] options options for OpenNebula driver (check the available
+    #   options in {OpenNebulaDriver#initialize})
+    # @option options [Boolean] :threaded (true) enables or disables threads
+    def initialize(directory, options={})
+        @options={
+            :threaded => true
+        }.merge!(options)
+        
+        super(directory, @options)
 
         @hosts   = Array.new
 
@@ -201,7 +210,9 @@ if __FILE__ == $0
 
     class TemplateDriver < VirtualMachineDriver
         def initialize
-            super(15,true)
+            super('vmm/dummy',
+                :concurrency => 15,
+                :threaded => true)
         end
 
         def deploy(id, host, remote_dfile, not_used)
diff --git a/src/vmm_mad/ssh/one_vmm_ssh.rb b/src/vmm_mad/ssh/one_vmm_ssh.rb
index 84ca9bd437..57a13ddb83 100755
--- a/src/vmm_mad/ssh/one_vmm_ssh.rb
+++ b/src/vmm_mad/ssh/one_vmm_ssh.rb
@@ -38,8 +38,12 @@ require 'getoptlong'
 class SshDriver < VirtualMachineDriver
 
     # SshDriver constructor
-    def initialize(hypervisor, threads, retries, local_actions)
-        super(threads, true, retries, "vmm/#{hypervisor}", local_actions)
+    def initialize(hypervisor, options={})
+        @options={
+            :threaded => true
+        }.merge!(options)
+        
+        super("vmm/#{hypervisor}", @options)
 
         @hypervisor  = hypervisor
     end
@@ -128,5 +132,9 @@ else
     exit(-1)
 end
 
-ssh_driver = SshDriver.new(hypervisor, threads, retries, local_actions)
+ssh_driver = SshDriver.new(hypervisor,
+                :concurrency => threads,
+                :retries => retries,
+                :local_actions => local_actions)
+
 ssh_driver.start_driver